Id stringlengths 1 6 | Tags stringlengths 3 101 | Answer stringlengths 38 37.2k ⌀ | Body stringlengths 26 26.8k | Title stringlengths 15 150 | CreationDate stringlengths 23 23 |
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1 | |arduino|stepper-motor|motor| | <p>An alternative to crafting your own drivers and pushing out the correct order of controls to a stepper's pairs, is to use an off-the-shelf driver for your stepper. Most feature a simple two-pin control, one for direction and one you pulse to take a step, that greatly reduces the number of pins you use on your ardui... | <p>How do use use an Arduino with a Stepper Motor? </p>
| Arduino Stepper Motor | 2009-10-28T03:18:50.070 |
2 | |arduino|maxmsp| | <p>This is a particularly clean implementation for automagic analog and digital input with some built-in code for using a 4051 multiplexer on the analog pins:</p>
<p><a href="http://pixlpa.com/blog/arduino-sensorbox-firmware" rel="noreferrer">SensorBox</a> by Andrew Benson
(via <a href="http://cycling74.com/forums/top... | <p>How can you get the analogue sensor data into Max MSP with an Arduino?</p>
| How can you get the analogue sensor data into Max MSP? | 2009-10-28T14:06:32.277 |
3 | |soldering| | <p>It's a tricky topic to get good information on, but lead-free solder's supposed to be worse for you, overall.</p>
<blockquote>
<p>The transition to lead-free soldering
has reduced strain on the environment,
but for the operator, the hand
soldering process has become more
dangerous. The lead in the solder ... | <p>How do I know when to use lead, flux-core, lead-free, or any other kind of solder out there? Do you have any tips on solder gauge for specific applications? </p>
| What are the different types of solder used for? | 2009-10-28T15:00:37.867 |
18 | |arduino|timer| | <p>I have heard about some problems being reported with the WDT and the regular bootloader, so you may want to try another bootloader with it, for eg Adaboot.</p>
<p>Also, you can do a bunch more stuff with the WDT besides just a reset. I recommend <a href="http://www.atmel.com/dyn/resources/prod_documents/doc2551.pdf... | <p>How do I setup a hardware watch dog timer with an Arduino?</p>
| Watch Dog Timer + Arduino | 2009-10-30T02:06:23.157 |
22 | |arduino|vga| | <p>Yes, but getting the VGA timings right is all about carefully timing your instructions.</p>
<p>I'd recommend the AVGA library, it can output VGA and CVBS/Composite PAL and NTSC from a humble ATMega168. It handles everything under interrupt, so you can just write your application in C and not worry about VGA timing.... | <p>Is there any method to output VGA with Arduino?</p>
| VGA Output from Arduino | 2009-10-30T10:58:41.967 |
23 | |arduino|ethernet|twitter| | <p>Have written what is hopefully a <a href="http://tronixstuff.wordpress.com/2011/03/08/moving-forward-with-arduino-%E2%80%93-chapter-30-%E2%80%93-twitter/" rel="nofollow">simple explanation</a> on how to send a tweet with Arduino and an ethernet shield. </p>
| <p>How do you send a tweet via Arduino using an Arduino Ethernet Shield? </p>
| Arduino Twitter | 2009-10-30T10:59:30.220 |
24 | |arduino| | <p>It depends on what Arduino you are talking about. The Uno has a barrel connector and recommends 7-12v. So any "Wall wart" with a center polarity positive connector that fits marked between 7v-12v should work fine. It's not clearly indicated but this is for "unregulated" and will be passed through an on board voltage... | <p>What's the correct DC adapter to use with an Arduino? Voltage, etc.?</p>
| Correct DC Adapter type to use for Arduino | 2009-10-30T11:02:47.427 |
25 | |analog|gauge|arduino| | <p>As an alternative to using an ammeter, you can use the cheap automobile instrument stepper motors like the Switec X25.168 or clones from VID and MCR. You can pick up the steppers on eBay for less than $5 each, and drive them directly from the Arduino I/O lines without a controller; without any other components what... | <p>How do you make / connect an Analogue gauge with Arduino?</p>
| Analogue Gauge with Arduino | 2009-10-30T11:04:38.293 |
26 | |arduino| | <p>You can use your scripting-language of choice (python, ruby, perl, ... ) and execute
the script from applescript.</p>
| <p>How do you control an Arduino using Applescript?</p>
| Applescript and Arduino | 2009-10-30T11:05:47.337 |
27 | |arduino|maxmsp| | <p>I'd agree SimpleMessageSystem looks like the easiest to impalement. However you can also pick up any serial communication that pops up in Arduino's serial monitor, by using the serial object that comes with MAX MSP.</p>
<pre><code>{
"patcher" : {
"fileversion" : 1,
"rect" : [ 54.0, 60.0, 602.0, 602.0 ],... | <p>What is a good software package for interfacing Arduino's input pins to MAX/MSP?</p>
| Software package for interfacing Arduino with MAX MSP? | 2009-10-30T11:07:13.747 |
28 | |arduino|bluetooth| | <p>You need an AVR ISP programmer. You just plug it onto the 6-pin header on the arduino board and program it with the Arduino application.</p>
| <p>How do you burn the Arduino Boot Loader onto the Arduino BT? </p>
| Arduino BT (bluetooth) Boot Loader | 2009-10-30T11:08:34.883 |
29 | |arduino|programming|sleep| | <p>here, my arduino sleep library</p>
<p><a href="http://code.google.com/p/arms22/downloads/list" rel="nofollow">http://code.google.com/p/arms22/downloads/list</a></p>
| <p>How do you program a sleep mode for your Arduino?
Especially for battery powered designs, what are good techniques for sleeping the CPU but waking up only when needed?</p>
| How to Sleep Arduino | 2009-10-30T11:10:09.810 |
33 | |arduino|avr|programmer| | <p>The answers from 2009 are a bit outdated now that the standard Arduino IDE includes <a href="http://arduino.cc/en/Tutorial/ArduinoISP" rel="nofollow noreferrer">ArduinoISP</a> which was based on Mega-ISP but is now officially supported by Arduino.cc. </p>
<p><img src="https://i.stack.imgur.com/UOVCN.png" alt="enter... | <p>Can you use the Arduino as an AVR programmer?</p>
| Arduino as AVR Programmer | 2009-10-30T11:44:36.307 |
37 | |arduino|atmega| | <p>Make sure you change the "Tools/Board" setting in the Arduino IDE to "Arduino Duemilanove or Nano w/ Atmega328"</p>
| <p>I have purchased an <a href="https://www.sparkfun.com/products/9217?" rel="nofollow">ATMega328</a> from SparkFun with the Arduino bootloader pre-programmed. My intention is to replace the ATMega168 I currently have in my Duemilanove. Is this as simple as swapping the chips, or will I need to take any additional st... | Upgrading an Arduino Duemilanove from ATMega168 to ATMega328 | 2009-10-30T13:57:13.107 |
42 | |conductive|thread|soldering| | <p>while it's not so much about making conductive thread, here is a good post talking about the different types of commercially available conductive thread. Gives a good run down of various comparisons, where to buy and what they cost. hope this helps!
<a href="http://www.fashioningtech.com/page/conductive-thread" re... | <p>I am a poor student, was wondering if anyone has any home-brew recipes for making conductive thread for use in wearable electronics?</p>
| Is there a way to make your own conductive thread for wearable electronics? | 2009-10-30T21:09:58.777 |
43 | |arduino|sensor|capacitance|capacitive|capsense| | <p>A capacitive touch sensor can be done without additional hardware. The trick is to enable the internal pull-up of a digital pin, and count the CPU cycles it takes to pull the pin up.</p>
<p>Code and explanation:
<a href="http://playground.arduino.cc/Code/CapacitiveSensor" rel="nofollow">http://playground.arduino.cc... | <p>Is there a way that I can make an Arduino or other Micro-controller detect a change in capacitance?</p>
<p>I'm thinking of having a screen on my door that only turns on when you touch the metal door handle. </p>
| Capacitive Sensing | 2009-10-30T21:40:46.470 |
49 | |arduino|serial|avrdude| | <p>The arduino IDE resets the attached arduino before running avrdude. It does this by telling the FTDI device to pulse the DTR line which is attached to the arduino's reset pin. Pekkaa found the example perl code which does this and updated the thread on the Arduino forums.</p>
<p>For completeness here is the command... | <p>If I have a sketch compiled to hex, is it be possible to upload this sketch to an Arduino board using avrdude directly from command line? </p>
<p>Pekkaa figured out that arduino ide executes the following command when uploading the sketch:</p>
<pre><code>./hardware/tools/avrdude -Chardware/tools/avrdude.conf -pm32... | Upload to an Arduino from the command line | 2009-10-31T11:02:33.090 |
56 | |arduino|ultrasound| | <p>Since the Arduino pin won't be able to source enough current to drive the transducer very well, you can use a transistor with base connected to the Arduino pin to drive the transducer. </p>
<p>If we assume the transducer is a 40kHz (very common) one, then you would toggle the pin at 40kHz. Nice and simple. </p>
... | <p>I am attempting to build a cat deterrent with an Arduino, something <a href="https://www.planeturine.com/planet-urine-products-catalog/catscram/" rel="nofollow noreferrer">akin to this</a>. I have figured out detection, and now realize that I need to use an ultrasonic transducer to produce the 'blast' that I need.</... | How do I drive an ultrasonic transducer with an Arduino? | 2009-10-31T14:04:01.707 |
59 | |audio|lcd|dsp|user-interface| | <p>you really, really, don't need a DSP to do even advanced audio filtering on a 44.1kHz 16bit stereo signal.</p>
<p>An ARM core will be just fine for the filtering and running the LCD/buttons.</p>
<p>I'd just grab a <a href="http://beagleboard.org/">beagleboard</a>, toss RT linux on it and have at it. If you get re... | <p>I am considering a project involving a fair share of digital signal processing. As far as I know, the best type of IC suited for this are the Digital Signal Processors. I have never worked with them before - can you recommend me any model that is simple enough for beginners? The project involves filtering hi-fi digi... | DSP recommendation for beginners | 2009-10-31T15:02:52.540 |
74 | |pic|microcontroller|mac|os| | <p>The MPLAB X (runs on Java, based on Netbeans) is available <a href="http://www.microchip.com/pagehandler/en-us/family/mplabx/" rel="nofollow">here</a> for Mac OS 10.X.</p>
| <p>How can I start PIC Microcontroller Programming on Mac OS X. Can I use an Arduino connected to my Mac has a programmer? Or do I need to buy specific programmer board and serial adapters?</p>
| PIC Microcontroller Programming on Mac OS X | 2009-10-31T23:28:52.823 |
77 | |microcontroller|sleep|indicator|low-battery| | <p>tinker.it published a "secret" voltage level meter in the Atmega168/atmega328. With a little trick an Arduino is able to compare VCC against an internal precision 1.1v reference. The explanation and the code is here: <a href="https://provideyourown.com/2012/secret-arduino-voltmeter-measure-battery-voltage/" rel="nof... | <p>I'm looking to make a battery life indicator that I can use in conjunction with a micro-controller. I'm hoping that I can then read the current battery life remaining and increasingly put the micro-controller to sleep to preserve battery life.</p>
| Low Battery Indicator | 2009-10-31T23:59:41.607 |
78 | |batteries|charging|lead-acid| | <p>after charge them full you can switch to trickle charging to make sure the battery stay full as lead batteries do self discharge. so if you store a battery for a long time you can connect it to a trickle/slow charger to make sure it will not over discharge</p>
| <p>Are there any special requirements for charging lead-acid batteries? </p>
| Charging lead-acid batteries? | 2009-11-01T00:01:33.320 |
83 | |infrared|arduino|library|remote| | <p>There is a great article about IR with Arduino on the PragPub Issue 13, July 2010 here: <a href="http://www.pragprog.com/magazines" rel="nofollow">http://www.pragprog.com/magazines</a></p>
| <p>I've just hidden away our entertainment centre electronics including our Infrared controlled DVD Player, Amp and Mac Mini .</p>
<p>I was wondering if there is any IR Remote code for Arduino, that I can use to eventually control the entertainment centre. I plan to write a simple iPhone app, that talks to an Arduino ... | IR Remote code for Arduino | 2009-11-01T00:34:17.887 |
89 | |arduino|sensor|hall-effect| | <p>Hall effect sensors and reed switches are the most mentioned here, and they're the best solution. </p>
<p>The <strong>reed switch</strong> will be cheaper, but may give you false pulses when the bike gets a shock. If that's just one from riding of the curb the software may easily filter it out, but it's different w... | <p>I'm trying to make an onboard system for my bike using an Arduino or maybe the Lilypad boards.</p>
<p>I think I should use a Hall effect sensor, but any alternative is good as well.</p>
<p>I want to output my speed to an LCD display and I'm wondering the best way to go about this.</p>
| How do I measure the RPM of a wheel? | 2009-11-01T04:02:41.727 |
91 | |lilypad|clothing| | <p>I have a Lilly Pad, along with several Arduino boards. I've been wanting to do some sewable/wearable projects but just didn't want to ruin the Lilly Pad on a mistake. So after reading Pulsea's instructable: <a href="http://www.instructables.com/id/Sewable_Arduino_Interface/" rel="nofollow noreferrer">http://www.inst... | <p>I want to make a vest that has LED all over it (for the purpose of night time cycling) but i want to be able to easily wash it.</p>
| With Lilypad boards, whats the best way to put them into clothing so they can be easiy taken out? | 2009-11-01T04:06:50.863 |
92 | |lilypad|clothing| | <p>I'd vote for corrosion, here's a photo from my collection:</p>
<p><img src="https://i.stack.imgur.com/onGY8.jpg" alt="When it rains on your telephone exchange..."></p>
| <p>If you have a funky Lilypad clothing and it gets rained on or you spontaneously decide to go for a swim in it :) what happen?</p>
| What happens to Lilypads in the rain? | 2009-11-01T04:08:58.713 |
110 | |arduino|motor|driver|brushless-dc-motor| | <p>You <strong>can</strong> drive it directly with Arduino if by driving you don't mean literally supplying current for the windings - any MCU would be much too weak for that. Besides, Arduino can sink but not source current yet you'd need both for a brushless motor. </p>
<p>However, if you use a very simple H-bridge ... | <p>Is it possible to drive a brushless motor directly with Arduino? Or should I revert on controlling a brushless motor ESC with PWM pulses? </p>
| How to drive brushless motor with Arduino? | 2009-11-01T16:47:20.203 |
114 | |arduino|wii|nunchuck|accelerometer|tutorial| | <p>Todbot wrote a <a href="http://todbot.com/blog/2008/02/18/wiichuck-wii-nunchuck-adapter-available/" rel="nofollow">tutorial</a> for this a while ago. He also made a small nunchuck-breadboard adapter so you wouldn't have to cut off the connector of your nunchuck to get to the wires. <a href="https://www.sparkfun.com/... | <p>Anyone got a good tutorial on using and Arduino to capture the Wii Nunchuck accelerometer data?</p>
| Using a Wii Nunchuck for data collection | 2009-11-01T20:51:43.910 |
119 | |resistors| | <p>The folks at <a href="http://itll.colorado.edu/index.php/electronics_center/resistor_chart/" rel="noreferrer">itll.colorado.edu</a> have a resistor chart that includes how to read 6 Band Resistors. You should start with the thick band. You can always test with a Multimeter too!</p>
<p><img src="https://i.stack.imgu... | <p>I've just bought a bag of random resistors from Maplin, and can't work out which way round the six band ones should be read.</p>
<p>For instance I have one which is either:</p>
<blockquote>
<p>Violet Orange Red Brown Brown Red</p>
</blockquote>
<p>or</p>
<blockquote>
<p>Red Brown Brown Red Orange Violet</p>
... | 6 Band Resistors, which way should the bands be read | 2009-11-01T23:38:56.817 |
126 | |pinout| | <p>I found a great article on <a href="http://hackaday.com/2010/09/02/using-an-nes-controller-on-an-android-phone/">Hack-A-Day</a> regaring your quest. This article is on interfacing the SNES controller with an Android utilizing an Arduino. To save you some of the trouble of sifting through the article, I found the l... | <p>Does anyone have a pinout diagram for the Nintendo NES Controller? I'd like to connect the NES controller to an Arduino.</p>
| Use an old Nintendo NES Controller as an input device | 2009-11-02T04:18:54.630 |
133 | |arduino|twitter| | <p>Baker Tweet is a nice arduino / Twitter project: <a href="http://www.bakertweet.com/" rel="nofollow">http://www.bakertweet.com/</a></p>
| <p>I'm looking for a list of cool projects that people have made with the arduino that twitter...i have read about plants that tweet when they need watering or pets who have a button to let you know when they are hungry....whole houses which twitter the power usage etc....</p>
<p>So is there a place to go for a list o... | Arduino Twitters | 2009-11-02T11:37:44.100 |
146 | |arduino|iphone|remote|control|tutorial| | <p>There's a lot of stuff on controlling things with the iPhone on the Arduino forum. <a href="http://www.google.com/search?ie=UTF-8&oe=UTF-8&q=iphone&btnG=search&domains=http%3A%2F%2Fwww.arduino.cc&sitesearch=http%3A%2F%2Fwww.arduino.cc%2Fcgi-bin%2Fyabb2%2F" rel="nofollow">Here</a> is what I found ... | <p>So i started this project a while back where i made a remote controlled car that i could control with the directional buttons on my keyboard via an Arduino -> now the next step i want to do is to get the tilt control in my iPhone to be driving the car :)</p>
<p>Anyone got a good tutorial on this?</p>
<p>Cheers,<... | Using the iPhone to control a remote controlled car via Arduino | 2009-11-02T21:30:17.370 |
147 | |arduino| | <p>take a look here <a href="http://www.liquidware.com/projects/26/TouchShield+Tetris" rel="nofollow">http://www.liquidware.com/projects/26/TouchShield+Tetris</a></p>
<p>it's a project about TouchShield Tetris </p>
| <p>How do i go about using the joystick with an Arduino?</p>
| Joystick with the Arduino | 2009-11-02T21:34:36.743 |
148 | |pins|arduino| | <p>This product is a simple and cheap way to add pins to your Arduino. There is an easy-to-use open source library for accessing the new pins:</p>
<p><a href="http://nootropicdesign.com/ez-expander/" rel="nofollow">http://nootropicdesign.com/ez-expander/</a></p>
| <p>If I'm running out of pins on an Arduino, short of buying a second one or getting a Mega board, is there a way to get more connected to the one board? Do I need to worry about overloading it?</p>
| Pins on an Arduino | 2009-11-02T21:37:44.747 |
149 | |arduino| | <p>You may also consider looking for newer versions of your sensors. You may be able to acquire sensors that both work with the same voltage limits, or you may find out that newer versions of the sensors are available which will give you digital outputs and can be polled with I2C or other simple serial communication p... | <p>To get full resolution from Arduino ADC when using 3.3V sensors you must do two things.</p>
<ol>
<li>Connect 3.3V power supply to AREF pin.</li>
<li>Call <em>analogReference(EXTERNAL)</em> in the code.</li>
</ol>
<p>But what about if I must mix 3.3V and 5V outputting sensors. What are my options?</p>
| How to use 3.3V and 5V outputting sensors with Arduino? | 2009-11-02T21:43:18.160 |
158 | |sensor|arduino| | <p>You want a signal range from 0V to 5V. Don't we all :-)? Let's go for a different approach and see where that gets us. </p>
<p>Starting point: cheapest and most simple solution. </p>
<p>That would be a series resistor to create a voltage divider. That's the absolute minimum. I've noticed that people don't give t... | <p>I am making an application using the DIY Force Sensitive Resistor (FSR) taken from <a href="http://www.instructables.com/id/DIY-Force-Sensitive-Resistor-FSR/?ALLSTEPS">this instructable</a>. The resistance of this sensor typycally ranges from 20kOhm when at rest to 9kOhm when pressed. </p>
<p>How would I convert th... | How would I get a full range voltage reading from a pressure sensor? | 2009-11-02T23:09:14.000 |
159 | |arduino|serial|lcd| | <p>You could use the <a href="http://www.adafruit.com/index.php?main_page=product_info&cPath=19&products_id=292" rel="nofollow">adafruit LCD backpack</a>. It supports either I2C or SPI. In SPI mode it's really just using a 74HC595 shift register.</p>
| <p>What sort of LCD should should i be using to go with my Arduino?</p>
<p>I have used the HD44780-compatible LCD in the past, but heard that the Serial Enabled LCDs make life a lot easier.</p>
| Serial Enabled LCD | 2009-11-02T23:20:57.270 |
167 | |arduino|serial|iphone|ipod| | <p>I wrote an application <a href="http://www.capsicumdreams.com/iphone/gps2ip/" rel="nofollow">GPS2IP</a> that outputs NMEA messages (and gpx and kml tracks) without a jailbroken device.<br>
You need to connect to your iPhone with a IP socket though, so that might be difficult for a very simple project. IP stacks for ... | <p>Does anyone know how to access the iPhone's serial port, from a program on the iPod to allow that application to send signals. The idea is that the iPod could be used as the brain for some kind of robot by using the serial port to tell an arduino what to do.</p>
| iPhone hardware serial port access | 2009-11-03T00:53:06.820 |
181 | |diagram|layout| | <p>I'd suggest starting with <a href="http://www.evosapien.com/robosapien-hack/nocturnal/RoboSapienV2/" rel="nofollow">Robosapien V2 Hacks</a>, which includes a number of documented mods, along with documentation of all of the parts and connections that make up a Robosapien. I also found a site with good photos of a <... | <p>Has anyone got a diagram of the layout of the Robosapien v2?</p>
| Modding a robosapien | 2009-11-03T20:48:38.947 |
183 | |servo|torque| | <p>The link I previously had here has long since died so here is a new one:</p>
<p><a href="http://www.mnbigbirds.com/Servo%20Torque%20Caculator.htm" rel="nofollow">http://www.mnbigbirds.com/Servo%20Torque%20Caculator.htm</a> </p>
<p>Which may or may not fit the bill.</p>
| <p>Does anyone have an easy to use Servo Torque Calculator?</p>
| Servo Torque Calculator | 2009-11-03T21:46:57.550 |
184 | |conductive|thread|clothing| | <p>Depending on the conductivity you need, there might be a solution with fabric made for clothing worn in ESD-protected areas. They contain conductive fibers to discharge static electricity. They do not necessary have a very low resistance, but might be conductive enough to sport some signal path.</p>
<p>You could bu... | <p>I'm looking for an alternative to conductive thread (since I lack some sewing skills). I have seen silver conductive pens but I'm wondering if they could be used for clothing?</p>
| Is there a way to print / draw a circuit on to clothing? | 2009-11-03T22:04:04.583 |
190 | |sound|microcontroller|arduino|sensor| | <p>From <a href="http://blog.makezine.com/archive/2009/11/secret_knock_detector.html" rel="nofollow noreferrer">Make magazine's blog</a>:</p>
<blockquote>
<p><img src="https://i.stack.imgur.com/BtkQD.jpg" alt="enter image description here"></p>
<p>RFID card readers becoming passé?
Maybe what you need to guard... | <p>How do I detect the pattern of the knock on a door, and use it as a signature to unlock a door?</p>
| How do I detect the pattern of the knock on a door, and use it as a signature to unlock a door? | 2009-11-04T04:49:59.410 |
195 | |microcontroller| | <p>I'm currently working on an open source project that is essentially a network enabled universal remote. The idea is, if you keep all your A/V equipment in a closet somewhere (with an Ethernet line into the closet) you can connect this device, and control your TV, cable, dvd player, etc. with any networked device. ... | <p>Ok, so I don't really want to turn the TV-B-Gone into a universal remote, <em>specifically</em>, but I would like to know/learn how I could go about creating a universal remote (I merely thought that working off of the TV-B-Gone would be a good point to start).</p>
<p>So yeah, anyone have any ideas as to how to go ... | Turning the TV-B-Gone into a universal remote | 2009-11-04T07:44:35.957 |
215 | |bluetooth|wii|remote|mac| | <p>I use a wiiremote with my mac mini, all you ned to do is pair the device. I then use MAX MSP to handle all the data, you could just access the bluetooth port directly, but there's a handy object called aka.wiiremote, it's available for free here -> <a href="http://www.iamas.ac.jp/~aka/max/" rel="nofollow">http://www... | <p>How do i connect a Wii remote to my Mac via Bluetooth?</p>
| Connecting the Wii remote to a computer via Bluetooth | 2009-11-05T02:19:43.833 |
224 | |lilypad|waterproof|clothing| | <p>Is there a reason you want to use resin as opposed to a product made for the purpose?</p>
<p><a href="http://www.mouser.com/Search/Refine.aspx?Keyword=conformal+coating" rel="nofollow noreferrer">Conformal coating</a> is what we use in the electronics industry. One advantage of this is that some types of coating a... | <p>Has anyone got an example of coating a Lilypad or some other electronics in resin to make them waterproof.</p>
<p>I'm wanting to make something that is really resilient -> Being lazy i want to be able to chuck it in the washing machine...hand washing is far too much effort.</p>
| Coating a Lilypad in resin | 2009-11-05T21:19:56.163 |
225 | |atmega|jtag|flash|parallel| | <p>Are you sure you need a JTAG programmer?
On most AVRs are two methods available to program the flash.</p>
<ul>
<li>Isp Programming</li>
<li>Jtag Programming
Isp programmer are cheaper, but JTAG supports debugging
For Jtag are mainly two Programmer available: Dragon and JTAGice mkii </li>
</ul>
| <p>Can you recommend an inexpensive product for flashing an in circuit (read: powered) ATMEGA32 via JTAG. </p>
<p>I have a parallel port available on my laptop dock/port replicator, which I am guessing may be the cheapest form of these. I intend to use PonyProg to flash the ATMEGA32. I do not need the capability to de... | ATMEGA32 Jtag flash | 2009-11-05T21:30:35.987 |
226 | |arduino|avr|jtag|debugwire|debugging| | <p>Another option for hardware may be the Bus Pirate at $27.15(sold though seedstudio) which also do other things. I haven't used it for JTAG yet, but this is what the manual says: <a href="http://dangerousprototypes.com/bus-pirate-manual/bus-pirate-jtag-guide/">link</a>.</p>
| <p>Can anyone advise what hardware and software is required for debugging AVR in circuits?</p>
| JTAG debugging AVR | 2009-11-05T21:42:51.407 |
253 | |laser|wearable| | <p>Cutting a single layer of lightweight fabric should be easy at 20 watts. Cutting stacked fabric will take significantly more since the focal point of the laser won't be optimum for all the layers. Still, fabric is easy to cut, so a 60 watt or so should be able to handle it.</p>
<p>There are people with laser cutt... | <p>I'm brainstorming a new project with my wife and was wondering
what type of laser I could use to cut multiple layers of fabric?</p>
<p>I'm totally new when it comes to lasers and integrated electronics.</p>
<ul>
<li><p>The laser would be mounted on something that moves it on the x and y axis.</p>
</li>
<li><p>I want... | What kind of laser should I get to cut fabric? | 2009-11-06T20:51:15.640 |
259 | |capacitive|controller| | <p><a href="http://m.alibaba.com/trade/search?SearchText=4+capacitive+touch+panel" rel="nofollow">http://m.alibaba.com/trade/search?SearchText=4+capacitive+touch+panel</a></p>
<p>I just found this. This is meant for B2B orders, so worst case, I will have to ask my electronics reseller to order them. There is also alie... | <p>Anyone know of a good source for capacitive touchscreens in low quantity at a reasonable price? Just something to play around with in projects, I'm interested in either small (eg for portable applications, 3-5") or large (eg for kiosk or standalone applications, 10-20"). I know I can get a resistive touchscreen for ... | Capacitive Touchscreen for DIY usage? | 2009-11-07T00:38:37.233 |
263 | |avr|led|diodes| | <p>When a diode is used as a voltage dropper for LEDs, diode capacity could be a problem at turn on and allow a very brief, but high LED current before the diode conducts. Scope checks of LED currents at turn on would show if this is happening.</p>
| <p>I'm setting up an attiny2313 to drive an array of LEDs and blink them in different patterns. Rather than putting a series resistor in line with each LED (they'll be controlled separately, so I can't do tricks like putting them in series with each other), I was wondering about just using a couple diodes to get the v... | Using diodes to limit current to LEDs | 2009-11-07T04:46:28.383 |
267 | |microcontroller|led|usb|motor|servo| | <p>Note that you don't have to start at such a low electronic level and spare more development time for the "gizmo" itself. Many companies sell USB devices for the DIY market, for instance:</p>
<p><a href="http://www.yoctopuce.com" rel="nofollow">http://www.yoctopuce.com</a></p>
<p><a href="http://www.phidgets.com" ... | <p>I've been writing Linux character device drivers for other people's stuff for some time. I'd like to find a new hobby and the thought of making my own USB gizmos seems really neat.</p>
<p>I would be thrilled to be able to control some LEDs, servos, and step motors. I really enjoy learning new things on my own and t... | I'd like to learn how to make my own USB gadgets | 2009-11-07T14:01:21.300 |
272 | |pic|ethernet|microcontroller| | <p>The RTL8305SC doesn't require any actual code, but you need to read through it's <a href="http://realtek.info/pdf/rtl8305sc.pdf" rel="noreferrer">datasheet</a> for a good description of how to wire it up.</p>
<p>In general, connect the output of the PIC's ethernet to one of the RTL8305's ports in a cross-over (or e... | <p>I'm starting a project using the Realtek <a href="http://realtek.info/pdf/rtl8305sc.pdf" rel="nofollow">RTL8305SC</a> ethernet switch. Does anybody have a good idea of how to use it, some code for it, or even a flow diagram of how it should be used in conjunction with an Ethernet enabled PIC?</p>
<p>Any help would ... | Using a RealTek Ethernet Switch | 2009-11-07T15:55:24.957 |
276 | |arduino|avr|teensy| | <p>I bought a teensy 4.0 to in January 2020 while in states after reviewing all the details and comparing with arduino. After I moved out of states to Asia, the pjrc website always displays that my ip is blocked and I have never been able to access their forum or read discussions. This has essentially left me to troubl... | <p>Has anyone used the <a href="http://pjrc.com/teensy/index.html">teensy</a>? - I have a need for a serial port as well as USB connection and this looks good. Any opinions welcome.
Is it difficult to use with the Arduino IDE? What are the downsides compared with the Arduino?</p>
| Teensy development | 2009-11-07T19:43:52.063 |
278 | |lilypad|ftdi|programmer|avrdude| | <p>It sounds like you're not selecting the correct board within the Arduino IDE.
Be sure to: </p>
<p>1) Download the latest version of Arduino from <a href="http://arduino.cc/en/Main/Software" rel="nofollow">http://arduino.cc/en/Main/Software</a>
2) Install the Arduino IDE and FTDI drivers
3) Select Tools>Board>LilyPa... | <p>I'm trying to get the Lilypad working on my machine but i get the following error.</p>
<p>I had a Google for it but everything keeps pointing to a problem with the board. I swapped it out and tried another Lilypad but got the same error...</p>
<p>the one i am using is the first <a href="http://web.media.mit.edu/~l... | Lilypad upload error | 2009-11-08T04:21:36.503 |
286 | |robotics|programmer|kits|microsoft| | <p>We built this autonomous robot with an Arduino.
<a href="http://www.youtube.com/watch?v=6J_eh1HPu54" rel="nofollow">http://www.youtube.com/watch?v=6J_eh1HPu54</a></p>
<p>Granted its a hobby robot, but you can get more advanced.</p>
| <p>Is there any cheap and very extensible robot kit, which can work with Microsoft Robotics?</p>
<p>I want to have a great choice of cool parts for a robot to buy :)</p>
<p><hr /></p>
<p>If where is no such robot kit which can work with MS Robotics, is there any chance to buy a very extensible robot which just can b... | microsoft robotics: cheap but very extensible robot? | 2009-11-08T19:28:57.457 |
292 | |avr|compiler| | <p>In addition to @NeedTungsten answer, codevision support bit type global variables to be stored in specific GPIO registers. These variables only take 1 bit of memory that is very great feature in memory constrained MCUs.</p>
| <p>What is the difference between Codevision AVR C and Atmel AVR C compiler?</p>
| Codevision AVR C and Atmel AVR C compiler | 2009-11-09T02:40:31.313 |
297 | |microcontroller|ethernet|tcp-ip| | <p>You can use almost <strong>any</strong> MCU with Wiznet <strong>W5500</strong> embedded <strong>MAC</strong> + <strong>PHY</strong> controller, it is driven by SPI. The advantages are: it has built-in network stack, Tx/Rx buffers, requires minimum MCU pins, simplified programming.</p>
<p>I just found another intere... | <p>What is a good microcontroller for doing Ethernet applications? Or do I just need a good Ethernet library to connect with an Ethernet MAC/PHY?</p>
| What is a good microcontroller for Ethernet applications? | 2009-11-09T18:53:27.737 |
304 | |avr|microcontroller|memory| | <p>Well, checking the <a href="http://www.atmel.com/dyn/resources/prod%5Fdocuments/DOC2543.PDF">ATTiny2313 documentation</a>, on page 15, it states:</p>
<blockquote>
<p>The interrupt execution response for
all the enabled AVR interrupts is four
clock cycles minimum. After four clock
cycles the program vector a... | <p>I'm using an ATTiny2313 to act as a serial concentrator. It only has 128bytes of RAM. I think I'm running out of RAM during the ISR. My question is how much RAM (stack) does an ISR use to save the context (registers). I.e. if I use ISRs how much will I have left out of 128 bytes.
Is there a way to detect stack overf... | ATTiny2313 ISR stack usage | 2009-11-09T22:35:03.667 |
310 | |generator|wave| | <p>For a simple oscillator people often think immediately of a 555 timer IC. This ciruit is even simpler: </p>
<p><img src="https://i.stack.imgur.com/VZGdO.png" alt="Oscillator"> </p>
<p>The <a href="http://ics.nxp.com/products/ahc/datasheet/74ahc1g14.74ahct1g14.pdf" rel="noreferrer">74HC1G14</a> is the single gate... | <p>What's a good circuit to use to generate a square wave? The exact waveform isn't too important - I just want to get a piezo buzzer cranking at 150 kHz. I also want efficiency and adjustable amplitude.</p>
<p>(Motivation: I want to vaporize some oil in order to burn it. I choose 150 kHz after the Glade Wisp as hacke... | What's a good square wave generator? | 2009-11-10T08:36:13.987 |
321 | |arduino|led|matrix| | <p>i followed the instructions posted here: <a href="http://ericlathrop.com/electronics/LedGrid.php" rel="nofollow">http://ericlathrop.com/electronics/LedGrid.php</a>
This one works.. i tried it using a 5x7 Led Matrix display with arduino.</p>
| <p>What is the best way I can hook <a href="http://cid-acbfe2d16cd0ace8.skydrive.live.com/self.aspx/Public/18068op.pdf" rel="nofollow">this 5x7 LED matrix</a> to an Arduino board?</p>
| How to hook up a 5x7 LED matrix to Arduino? | 2009-11-10T14:31:39.517 |
328 | |motor|torque|indicator|robotics|measurement| | <p>I've always used a standard spring kitchen scale rotated. Put the scale between the robot and a wall (or another fixed object) and let the robot push... </p>
<p>BTW: This is one of the tips that are also suggested in the robotic sumo chapter of "Building Robots With Lego Mindstorms" book by Mario and Giulio Ferrari... | <p>I've been playing around with a Lego Mindstorms NXT robot, gearing it for speed and power. To my dismay, when geared for power, it wasn't any harder to stop than when geared for speed -- I suspect that it doesn't have very good traction (as there really isn't much mass pushing down on the wheels).</p>
<p>It would ... | Measuring force developed by a robot | 2009-11-10T20:58:01.757 |
330 | |atmega|bootloader|arduino| | <p>Yes - all boards with ATMega labelled Arduino come with the bootloader. Individual chips will say specifically, generaly if ordered from an Arduino supplier then they will have bootloader, whilst if ordered from generic electronic supplier they will not.</p>
| <p>Do the Arduino Duemilanove USB Board with Atmega328 come with the Arduino bootloader?</p>
| ATMega chips come with the Arduino bootloader | 2009-11-10T22:56:24.180 |
339 | |arduino|reset| | <p>Nothing gets wiped on reset. To answer your first question. </p>
<p>Whether the code, or the eeprom data can be retrieved depends on the fuse settings. These determine if the flash and/or eeprom can be read. </p>
| <p>Does the Arduino chip get wiped of any (uploaded) code when you press the reset button?</p>
<p>and</p>
<p>Can you retrieve the code that is currently on the chip?</p>
| Arduino chip wipe on reset | 2009-11-11T10:59:32.737 |
347 | |microcontroller|arduino|avr|atmega|bootloader| | <p>I've done this - pulled the 168 from an arduino, programmed it with the USBtinyISP. You'll need some form of target board for the USBtiny ISP. I used <a href="http://evilmadscience.com/tinykitlist/74-atmegaxx8" rel="nofollow">one of these from Evil Mad Scientist Labs</a>, along with a ZIF socket from Sparkfun. Th... | <p>If I upgrade my arduino from the ATMega168 to ATMega328 will I be able to use the ATMega168 like a stock chip from the factory or will the bootloader prohibit this? In other words, will I be able to overwrite the bootloader, with my usbtiny ISP programmer, on the 168 to use as a Atmel stock chip with Avrdude?</p>
<p... | Arduino Bootloader | 2009-11-11T16:44:12.617 |
350 | |serial|spi|i2c|logic-analyzer| | <p>The OpenBench Logic Sniffer is open source hardware and retails for around $30-$40</p>
<p>It supports the Sump client that runs under Java and it has I2C & SPI protocol analyzer plugins. I run it under OS X & Linux</p>
<p><a href="http://dangerousprototypes.com/2010/02/25/prototype-open-logic-sniffer-logic... | <p>If I have an unkown device which talk I2C or SPI how can I reverse engineer the protocol. Basically I am looking for something similar as <em>snoop</em> or <em>tcpdump</em>. </p>
<p>For software Mac is preferred but can also run PC under parallels.</p>
| How to reverse engineer I2C and SPI protocols? | 2009-11-11T19:29:00.990 |
372 | |arduino|lilypad|bluetooth| | <p>Without knowing which BT module you are using it will be a little difficult to help, but. As mentioned above using the BlueSMiRF board and some jumper wires you can attach</p>
<ul>
<li>5v to PWR</li>
<li>(-) to GND</li>
<li>tx to RX - I </li>
<li>rx to TX - O</li>
</ul>
<p>If you have a specific BT module you are ... | <p>How do i connect bluetooth to Lilypad Arduino?</p>
| Connecting bluetooth to Lilypad Arduino | 2009-11-12T07:10:41.983 |
391 | |serial|bluetooth|robotics|xbee|3pi| | <p>For the most part I agree with Hristos, but must disagree about Xbee. I have done this with both devices and there was not a significant difference in complexity.</p>
<p>I would point out, there is a good rule to remember here, like occam's razor for electronics, try to stick with the most common and accessible tec... | <p>I want to use bluetooth to grab the info off my 3pi rather then have it display on the small LCD.
Pololu provides a lib for serial communication.</p>
<p>I'm wondering what the best bluetooth/serial module to use is? </p>
<p>A friend recommended the Xbee module - Any thoughts?</p>
| 3pi Robot with Bluetooth | 2009-11-12T23:06:04.733 |
403 | |pololu| | <p>Pololu now sells the <a href="http://www.pololu.com/catalog/product/2506" rel="nofollow noreferrer">Pololu Zumo Robot for Arduino</a>, which is a good choice if you are familiar with Arduinos or want to benefit from the large support community Arduino offers.</p>
<p><img src="https://i.stack.imgur.com/cRFbl.jpg" al... | <p>Has anyone had much experience with the <a href="http://www.pololu.com/" rel="nofollow">Pololu</a> Robots </p>
<p>Which are the coolest? what do you recommend i get? </p>
<p>I'd like to hear about some cool projects with these Robots :)</p>
| Experience with Pololu Robots | 2009-11-13T03:06:19.533 |
406 | |usb|serial|adapter|keyboard| | <p>If you want it to behave like a USB keyboard, you're going to have to have a microcontroller that translates between the <a href="http://en.wikipedia.org/wiki/Apple%5Fdesktop%5Fbus" rel="nofollow">ADB protocol</a> and the <a href="http://en.wikipedia.org/wiki/USB" rel="nofollow">USB protocol</a>, and which implement... | <p>I have an old Apple keyboard that I would like to use but it uses the ADB bus instead of the newer USB bus. Griffin used to produce a product called the iMate which was an ADB-to-USB converter but have since discontinued it.</p>
<p>So I've decided to build one. It shouldn't be that difficult right?</p>
<p><a href=... | Apple Desktop Bus (ADB) to USB Adapter | 2009-11-13T03:46:12.637 |
433 | |microcontroller|spi|programming|jtag| | <p>As you mention serial, spi (2 wire, 3 wire?), usb, jtag, swd, etc are all used.</p>
<p>Yes there are pros and cons. Jtag for example is for all the cases I know about built into the hardware, originally and primarily used for something other than processor debugging, but they happen to use it for that as well. if... | <p>I've noticed, with regards to microcontrollers, there are several way to program them. I am sorta familiar with USB as my Arduino's can be programmed via USB. </p>
<p>What is a JTAG or SPI interface? </p>
<p>Ultimately I know that these interfaces provide a means to flash the chip with new instructions but how do ... | Programming microcontrollers: JTAG, SPI, USB oh my!? | 2009-11-14T03:51:47.953 |
437 | |avr|current|sinking|sourcing| | <p>The '238 have only one of eight outputs logic high, sourcing current, the rest of the pins will be logic low, sinking current. The '138 is precisely the opposite, one of eight pins can be low, sinking current, the rest will be high, sourcing current.</p>
<p>To "invert" the function of the '138, you could use eight... | <p>I'm building a <a href="http://www.lhexapod.com/blog/2009/08/a-timer-driven-pwm-servo-controller---part-4.html" rel="nofollow noreferrer">serial servo controller</a> to learn about electronics and assembly language as part of my <a href="http://www.lhexapod.com" rel="nofollow noreferrer">hexapod robot project</a>. Q... | How to redesign a circuit to use a current sinking IC rather than a current sourcing IC | 2009-11-14T14:29:26.360 |
441 | |microcontroller| | <p>I know this post is ancient, but I stumbled upon it while searching for something else.</p>
<p>I cannot recommend the Propeller enough. I have learned more about EE using that thing that I have with just about anything else. It's just so versatile.</p>
<p>Plus, one thing to mention is the PASM (assembly language... | <p>How does the Parallax Propeller stack up against other multi core solutions? I just saw an article about the open stomp project that won their design contest. I wanted to see what other people thought of the chip. Any similar, but better products? </p>
<p>How does spin rate?</p>
| Is Parallax Propeller a good product? | 2009-11-14T20:32:29.257 |
442 | |pic|programmer|microcontroller| | <p>If you want to use PICs I would seriously consider the PIC24 series of 16 bit pics or the very similar dsPIC33. They are faster, more powerful, in many ways easier to program, and don't cost any more than the most basic 8 bit ones. The lower end ones are available in breadboard friendly DIP socket packages too.</p>
... | <p>I've been looking into doing some PIC Programming, but unlike some of the other microcontrollers available the sheer number of different chips available has caused me some confusion. It also appears that some of the chips suggested on some sites as good choices for people starting out with PIC programming may have b... | Starting out PIC Programming | 2009-11-14T22:12:21.940 |
460 | |arduino|random-number| | <p>You could use the sensor input as seeds to a pseudo-random number generator. The Linux OS uses input from the keyboard/mouse as seeds to /dev/random. Just an idea.</p>
| <p>I'm putting together a design for a hardware random number generator that will utilize multiple sources of entropy (<strong>combined</strong>):</p>
<ul>
<li>Ambient light</li>
<li>Ambient sound (and sound levels)</li>
<li>Ambient temp</li>
<li>Ambient humidity</li>
<li>Position of the device itself (upside down, ti... | Is Arduino ideal for making a HRNG (hardware random number generator)? | 2009-11-15T17:00:13.657 |
464 | |microcontroller| | <p>This answer strays far from the strict question but is in line with most other answers - and should be fun and useful:</p>
<p>RS232 is upside down</p>
<p>Most of everything you will have problems with will be caused by "boundary conditions" - stuff that happens as things get going or start stopping.</p>
<p>Always... | <p>When working with AVR microcontrollers or Arduinos, what is something that if you had known sooner would have saved you a lot of time or frustration?</p>
| What do you wish you had known before you started with Microcontrollers? | 2009-11-15T19:05:30.727 |
466 | |resistors|operational-amplifier|amplifier| | <p>Test specifications always go into great detail describing test conditions and the test environment, otherwise you the test wouldn't be repeatable with the same results. For this case the test spec apparently says load must be 200\$\Omega\$.<br>
But since the 1600\$\Omega\$ + 400\$\Omega\$ are parallel to the 200\$... | <p>Here's a circuit diagram for a signal response test circuit from the spec sheet for a HA-5195 op amp and looks like a non-inverting amplifier circuit with a gain of 5, plus the 200Ω resistor between Vout and ground: </p>
<p><img src="https://i.stack.imgur.com/bKyZr.png" alt="enter image description here"></p>
<p>I... | Why the resistor in this op-amp circuit? | 2009-11-15T21:43:52.733 |
484 | |laser| | <p>Have you considered <a href="http://www.razorlab.co.uk/" rel="nofollow">RazorLAB</a>?</p>
<p>Also, if you're in London, University of the Arts appears <a href="http://www.csm.arts.ac.uk/37056.htm" rel="nofollow">to make its laser cutter available to external clients for a fee.</a></p>
<p>I've not used -- and have ... | <p>Has anyone had any experiences with laser cutting services in the UK? I've googled but most of the results seem to be for expensive industrial setups. What I'm looking for is someone who can do pretty much what the Pololu service <a href="http://www.pololu.com/catalog/product/749" rel="nofollow">here</a> does but ne... | Reasonably priced laser cutting service in the UK? | 2009-11-16T12:32:18.903 |
489 | |frequency-modulation|sound|audio|motor| | <p>Are you trying to spin the motor at a rate proportional to the <strong>volume</strong> of the sound, or the <strong>frequency</strong>?</p>
<p>The amplitude is easy, just rectify, integrate, and amplify (diode -> cap -> amplifier).<br>
Speed proportional to frequency is more involved. <strong>Way</strong> more invo... | <p>I'm trying to control a DC (pager) motor with a sound signal so that I can use an audio synthesizer to control the speed of the motor. I'm hoping to modulate the speed of the motor at audio rate (1-200hz). I need to do a few things. </p>
<ol>
<li>Convert AC -> DC. A rectifier will chop the negative or fold it up, b... | Controlling DC (Pager) Motor with Audio Signal | 2009-11-16T19:48:15.433 |
511 | |avr|windows| | <p>Personally I use a virtual machine running XP...</p>
<p>I notice that Dean Camera (a regular over at AVRFreaks) has been playing with getting AVR tools to work on x64 boxes. See this posting on his blog: <a href="http://fourwalledcubicle.com/blog/archives/467" rel="nofollow">http://fourwalledcubicle.com/blog/archiv... | <p>I've attempted installation of AVR studio 32 (for AVR32 UC3 development) and it doesn't appear to work.</p>
<p>Has anyone here gotten this to work in Vista 64?</p>
| Running AVRStudio 32 and JTAGICE MKII on Vista 64 | 2009-11-17T13:36:47.157 |
514 | |bluetooth|wearable|wireless|keyboard| | <p>I would still go for the microcontroller approach. Check Aliexpress or similar, you should be able to get a pretty decent deal (<10 CAD) on some MCU with bluetooth. From there its just figuring out the specific of the Bluetooth driver, or using a premade library, like <a href="https://github.com/T-vK/ESP32-BLE-Mo... | <p>Thinking of building a device for sending text and probably mouse movement into a computer, but I want it to be wireless and compatible with many computers/PDAs/phones without a specialized dongle, etc. So I thought "Hey, Bluetooth is a standard for input devices and lots of computers/PDAs/phones have it built in!"... | Cheapest, simplest way to implement a Bluetooth keyboard/mouse? | 2009-11-17T17:04:55.840 |
515 | |power-supply|capacitor|voltage-regulator|frequency|rectifier| | <p>The thing is that these days switching power supply adapters are such a commodity item that unless you really want to get into the design for learning purposes, just buy one. Digikey has a few that are under $10 in single quantities (<a href="http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=T1038... | <p>I am designing a circuit that needs to output 5VDC @ 1A. I'm trying to use a wall transformer to step the voltage down to 12VAC. The next step is the diode bridge and ripple capacitor.</p>
<p>The ripple voltage equation is:</p>
<p>$$V_{ripple} = \frac{I}{2fC}$$</p>
<pre><code>I = load current (1A)
f = AC freque... | How to convert AC to DC | 2009-11-17T18:09:25.687 |
527 | |arduino|speech| | <p>Just discovered this blog post on LMR. Looks pretty cool.
<a href="http://letsmakerobots.com/node/11969" rel="nofollow">SpeakJet</a></p>
| <p>has anyone used the arduino to convert text to speech?</p>
| Arduino Text to Speech | 2009-11-18T02:01:54.657 |
528 | |microcontroller|programmer|current|output| | <p>One cheap solution is to create a PWM signal, filter it with a RC cell, and then feed it to a voltage-to-current converter. In the simplest case, this can be a transistor with a resistor in the emitter, and the load in the collector. But you can also use an op amp for this. Since you only need a 20-step scale, this ... | <p>I need to build a programmable current source from a 8051 microcontroller.</p>
<p>It needs an output current from 0 to 10mA maximun. </p>
<p>How do i go about doing this? what circuits do i need to build?</p>
<p>I was going to do a 20 steps - with 0.5mA so from 0 to 10mA is 20 steps.</p>
| Programmable current source | 2009-11-18T02:40:34.107 |
532 | |arduino|header|sourcing|protoboard|enc28j60| | <p>On eBay use search criteria "Arduino 15 mm Headers"...
You'll get some 16 entries, very reasonably priced with free shipping...
They have 10 piece and 100 piece entries for 10 8 and 6 pin headers...
If you're using ICSP, either cut & double, or buy the 2 row 5 piece - 2 x 18 sets, which you will need to slice ou... | <p>I have recently purchased a sparkfun protoboard that I wish to stack above an ethernet shield. (I have 2 different ethernet shields, an Arduino one and a seeed studio enc28j60 shield.)</p>
<p>The problem I have is that if I use the supplied headers, or even the longer "Arduino Stackable header" then the magjack fro... | Where can I source extra long headers from | 2009-11-18T07:04:31.783 |
546 | |level-shifting| | <p>In the question, a single <a href="http://en.wikipedia.org/wiki/Common_emitter" rel="nofollow">common emitter transistor amplifier</a> is described and this inverts the signal. </p>
<p>You need two stages. Duplicate your circuit, feed the output of what you have now into another common emitter amplifier. Adjust the... | <p>I need to make a voltage level shifter. It needs to translate a TTL logic level into a 12 V logic level.</p>
<p>I have applied the 5 V at the base and 12 V V<sub>cc</sub> and took the output from the collector (not using any emitter resistor). The output was good, but the current was 0 mA when V... | Voltage level shifter | 2009-11-18T22:20:17.147 |
554 | |rfid|antenna| | <p>This is a bit old, but in case someone else is reading in 2012. Actually there are then three "types".. Another common one is 134.2 kHz</p>
<p>Quoted from above answers:
....before beginning, you have to know that there are mainly two type of RFID Reader:</p>
<p>125 khz : antenna of 100 turn coil
13.6 Mhz : anten... | <p>What's involved in building your own RFID reader? As you guys would know industrial RFID readers aren't cheap, how do you energise the antenna, then read back the output?</p>
| How do you build your own RFID reader? | 2009-11-19T06:23:33.180 |
562 | |led| | <p>To be seen from a long distance you have to compromise.</p>
<p>Increasing visibility from a single point or a certain direction is possible by reducing the angle of radiation without adding a huge amount of power. The narrower the cone the radiation is confined by the housing of the LED the more power will be direc... | <p>I'm working on making a sign that will be outdoors in full sunlight and I want it to have the longest range visibility.</p>
<p>This is a project for university and I will probably need 100 LEDs or so -
I need the cheapest possible but I really want people to be able to see it from afar!</p>
| LEDs for full daylight | 2009-11-19T21:18:08.270 |
563 | |temperature|humidity| | <p>The moisture measurement solutions from MAC INSTRUMENTS, provided in the link below, have range up to 1200<sup>o</sup>F. These might suite your requirement.</p>
<p><a href="http://www.macinstruments.com/" rel="nofollow">http://www.macinstruments.com/</a></p>
| <p>Where can I get a high temperature humidity sensor for temperatures up to 700 or 800 degree Fahrenheit (~ 370 or 425 °C)?</p>
| High Temperature Humidity Sensor | 2009-11-19T22:12:07.957 |
565 | |arduino|motor|servo| | <p>Another approach is to use "digital" servos, such as <a href="http://openservo.com/" rel="nofollow">OpenServo</a>. That way you can drive a dozen or so servos using 2 Arduino pins, and a dozen or so more servos using 2 more pins.</p>
| <p>My friend Jules asks:</p>
<blockquote>
<p>The aim is to get as many servo motor controls as possible - looks like the maximum an Arduino will output is 14?</p>
</blockquote>
<p><a href="http://arduino.cc/en/Main/ArduinoBoardMega" rel="nofollow"></p>
<blockquote>
<p>Digital I/O Pins54 (of which 14 provide PWM ... | Synchronise multiple Mega boards to run multiple servo motors | 2009-11-19T22:28:24.540 |
576 | |arduino|pcb|pcb-fabrication| | <p>Make sure all the mounting holes are in the correct location. Also check all the components that need to poke through the enclosure such as LEDs and switches and connectors are in the correct location.</p>
| <p>I'm anxiously awaiting the delivery of my second set of custom designed PCBs from BatchPCB.</p>
<p>The first board I designed was pretty darn simple and didn't have any problems.</p>
<p>This second set includes a full on arduino compatible board plus two shields for it. Somehow I suspect I made a mistake somewher... | Custom PCBs... what can go wrong? | 2009-11-21T01:08:59.770 |
581 | |voltage|sensor|infrared| | <p>I think a key to this kind of thing is to modulate the IR. Then in the detector have a lot of gain in the band you used to modulate the signal. This lets you extend the range without picking up a lot of other light noise. Reflection can depend a lot on the surface you are reflecting from so distance is still unce... | <p>I am building a distance sensor..I have the ucontroller portion done. I was going to use IR to reflect a beam and get a proportional analog voltage to estimate distance but...it has no range</p>
<p>Any ideas/methods? </p>
| Distance sensor IR | 2009-11-21T04:18:47.013 |
592 | |operational-amplifier|tutorial| | <p>The "IC Opamp Cookbook" paperback was ~THE~ standard for hobbyist electronics back in the 80s. Still a good reference. </p>
| <p>Can anyone point me to a tutorial for electronic noobs that
explains how to use op-amps and what I can do with them, besides
amplification?</p>
| Op-amp tutorial for electronic noobs? | 2009-11-21T20:01:19.477 |
597 | |led|display| | <p>An 8-row by 16-column, cathode-row driver will at any given time drive exactly one of the 8 row wires low, while driving a program-selectable subset (none, some, or all) of the column drivers high. An anode-row driver would drive one of eight wires high, while driving selected columns low.</p>
| <p>"The MAX6960–MAX6963 are compact cathode-row display drivers"
What does cathode-row mean?</p>
| What does 'cathode-row' mean? | 2009-11-22T08:35:13.680 |
599 | |avr|analog|microcontroller| | <p>(I really have no experience with this particular application, so this is a bit of a shot in the dark - hopefully it'll give you some ideas)</p>
<p>How thoroughly have you separated this from the rest of the drive circuitry? From the part where you say you disconnected the wires from the laser head, it sounds like... | <p>I have an old CD-burner (HP 9100 plus) where I would like to control the BLDC motor from.</p>
<p>My idea is to use the original IC of the burner as the driver and use an ATtiny13 for controlling it. There are however some problems. </p>
<p>I found out that the IC is similar to the LB11699H <a href="http://www.alld... | Hacking/Controlling BLDC from CD-burner | 2009-11-22T16:07:04.200 |
605 | |rgb|led| | <p>You can use 8 of the TLC5947.</p>
<p><a href="http://focus.ti.com/lit/ds/symlink/tlc5947.pdf" rel="nofollow">http://focus.ti.com/lit/ds/symlink/tlc5947.pdf</a></p>
<p>TLC5947 is 24 channels of PWM controlled by shifting in 12 bits of brightness data for each channel. This would give you would give you a nearly co... | <p>I was wondering if there was a single IC like the MAX6960 that could control a whole 8x8 RGB LED Matrix because the MAX6960 can only control a RGY.</p>
| Is there a single IC that can control a 8x8 RGB LED Matrix | 2009-11-23T11:06:04.533 |
621 | |wire|prototyping| | <p>For prototyping, solid is easier to push into breadboards, through PCB holes, etc.</p>
<p>For real-life it's a combination of all the issues in all the other answers, each type has advantages & drawbacks.</p>
<p>Solid is used extensively for telecomms, where it gets installed/laid once & left and either wi... | <p>What are the advantages of stranded vs solid wire?</p>
<p>what should i be using for prototyping circuits?</p>
| Stranded vs solid wire | 2009-11-23T23:23:49.390 |
622 | |voltage|stepper-motor| | <p>You're working with an I2C bus, right? I'm going to call the lines on the 3.3 V side <em>SDA3</em> and <em>SCL3</em>; the two lines on the 5.0 V side <em>SDA5</em> and <em>SCL5</em>.</p>
<p><strong>"<a href="http://en.wikipedia.org/wiki/MOSFET" rel="nofollow">MOSFET</a> and two resistors"</strong></p>
<p... | <p>So I've been reading a few threads here and on other forums. I understand there are various solutions for stepping down or up a voltage. What I have found are the LVC series shift regs that give a constant ouput, <a href="http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en531457" rel="noreferrer">MCP1825... | Bi-Directional Step up and Step down (3.3v <-> 5, etc) | 2009-11-23T23:30:15.870 |
627 | |motor|stepper-motor|servo|sourcing| | <p>Even though they are in Victoria, you might consider <a href="http://www.oceancontrols.com.au" rel="nofollow">http://www.oceancontrols.com.au</a>. They have a few types of motors including some interesting stepper motors.</p>
| <p>I'm looking to start a few different projects and stock up on some basic components - I was just wondering if anyone knows a good supplier of DC motors, stepper motors and servos?</p>
<p>I'm in vicinity of Sydney in Australia, so big pats on the back if they ship here. Thanks!</p>
| Good motor supplier? | 2009-11-24T00:00:23.110 |
632 | |pic|microcontroller|books|development| | <p>For ARM chips I have learned a lot from:
<a href="http://rads.stackoverflow.com/amzn/click/0201675196" rel="nofollow">ARM System-on-chip architecture</a> by Steve Furber</p>
<p>It is a well-written book with a lot of technical background and will probably be useful even if you work on other architectures.</p>
<p>I... | <p>I do a lot of firmware work at my job, but I'm looking for more advanced books on the topic. Things not like the basics of "what is an interrupt". I'm reading the O'Reilly book on embedded systems development which is OK, but not advanced enough. For instance, its rare for books to discuss things like Flash pages... | Good book for non-beginner firmware development | 2009-11-24T02:19:50.567 |
639 | |sensor|wire|interference|shielding|soldering| | <p>Simple twisted pair (with no shielding) might be all you need. The twists in the wire make noise common to both wires be out of phase with each other and thus cancel each other out.</p>
| <p>I am trying to minimize interference in a sensor project. Can anyone recommend a good shielded wire I can solder into my board?</p>
| Wire to use with Sensors | 2009-11-24T06:41:53.750 |
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