44 posts tagged with arduino. (View popular tags)
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How to cut traces and wire jumpers on Arduino Shield PCB

I'm a total hardware engineering noob who's getting into Arduino development. I have an Electric Imp connected to the Arduino via a shield, which works great. However, I've added another shield that conflicts with the pins that are used by the Electric Imp for software serial IO. The Imp shield says that I can cut a trace and wire a jumper to use hardware serial on two open ports instead. I've never done this before – can someone give explicit steps as to what I need to do? [more inside]
posted by krunk on Feb 11, 2014 - 5 answers

 

How to automatically measure duty cycle of an AC device?

I have a mains-powered pump which switches itself on and off automatically depending on water level. I want to monitor the duty cycle of this pump (how long it is on for, and how long it is off for) without having to manually watch the pump and use a stopwatch. Is there some device that I can use to monitor the duty cycle automatically (for example, an intelligent socket that I could plug the pump in to)? It would need to have a readout that told me the length of the last OFF and ON periods (remote monitoring via wifi would be ideal). Alternatively, what would be the easiest way to build such a device? I'd be competent to investigate Arduino or Raspberry Pi based solutions, for example.
posted by beniamino on Jan 11, 2014 - 11 answers

What am I doing wrong with this wiring?

I am playing with an animatronic toy I got from a thrift shop. Before I started trying to hack it, there was a rocker switch that when pressed in one direction, made the head turn left, and when pressed in the other direction, made the head turn right. I have hooked this up to my arduino by replacing the switch with transistors, but the head now will only turn right. Without knowing exactly how the circuit board inside the toy works, is there enough information to figure out what I'm doing wrong? [more inside]
posted by lollusc on Jan 3, 2014 - 10 answers

DIY telescope control system

How can I learn more about DIY electronic controls for DIY telescopes? Surely there's a reason I'm not finding my particular idea represented online. [more inside]
posted by odinsdream on Dec 29, 2013 - 7 answers

Arduino & other electronic project kits for a 10 year old boy

More gift advice needed! For a 10-year-old science geek with advanced computer and electronics skills for his age, I am looking for cool electronics project kits. He has an Arduino starter kit and has worked with that a lot. He has some soldering skills. He's into digital audio at the moment. He also has a Mac laptop and an iPad, in case it's relevant. Looking for things in the $75-150 range.
posted by spitbull on Dec 15, 2013 - 9 answers

How would MacGyver build a remote freezer temperature alarm?

I work in a research lab and one of our most critical pieces of equipment is a large chest freezer that normally runs around minus-80-degrees Celsius. It is an older unit with audible alarms built in, but no in-built remote monitoring capability. We'd like to install a simple means of detecting out-of-range temperature conditions and sending out a text message, etc., if the unit starts getting too warm. What's the best way to go about this? [more inside]
posted by aecorwin on Sep 25, 2013 - 12 answers

Wifi enabled temperature sensor

Hello Mefites. I'd like to acquire a wifi enabled temperature sensor. One that would let me grab current temperature over HTTP. Ideally something off the shelf but if that's not cost effective (under $50, but cheaper is obviously better) then I would love to try building one myself. Arduino? RaspeberyPi?
posted by aeighty on Sep 9, 2013 - 8 answers

Android + Arduino prototype. How to get it made for me.

I have an idea for an android phone accessory. I would make it myself, but my programming/micro-controller design skills are lacking. How can I get it built for me? [more inside]
posted by nihlton on Jul 10, 2013 - 9 answers

How do I make a digital self-destructing Mission: Impossible tape?

I want to build a device that will play an audio file once and only once - basically the self-destructing tape from Mission: Impossible, but updated to the digital age. Bonus points for a setup that ends with an audible sizzle and a puff of smoke, yet isn't a federal offense to put through the USPS. Is it possible to do this with a microcontroller like Arduino or Raspberry Pi? I'm a complete beginner to this kind of 'Maker' stuff, so I'm aware I may not even be asking the right questions. Here's a link to instructions about an analog version: http://ask.metafilter.com/180544/in-5-seconds
posted by boghead on May 17, 2013 - 7 answers

Arduino processing two wire alarm signal - how to?

I bought this cheap wireless driveway alarm system (a battery-powered motion sensor with base that beeps when someone pulls into my driveway) and one of its features is that you can connect it to "to any security system that has a two wire alarm input". I was wondering if anyone could point me to a guide for processing that output using the Arduino? I'd love to - for example - turn on a light automatically when I pull into my driveway, or send an e-mail, or other cool stuff.
posted by exhilaration on May 14, 2013 - 8 answers

Where to buy an Arduino kit in Portland

Where can I buy an Arduino kit in Portland, Oregon today? Ideally, this would be a kit for a beginner which comes with sensors, project ideas, etc. Google-fu has failed. I would also consider the Raspberry Pi, but Arduino sounds like the thing.
posted by klausman on Apr 27, 2013 - 6 answers

What do I build with?

I've been messing around with small motors via Arduino, but I realized I have absolutely nothing with which to make stuff that will be powered by said motors. What's a inexpensive box-o'-parts construction set for moving parts? [more inside]
posted by griphus on Mar 7, 2013 - 11 answers

Arduino time alarm without an external interrupt alarm pin on the RTC?

I want to program my Arduino to go to sleep at 6 pm and wake back up at 5 am, and then execute a few simple functions once every hour while it's awake. I have a DS1307 real-time clock, but it doesn't have an alarm interrupt pin, so I can't just set up an external interrupt to tell the Arduino to wake when the alarm pin is set to high. What's the best way to do this without an alarm pin? [more inside]
posted by dialetheia on Feb 12, 2013 - 5 answers

Diodes, transistors, resistors, oh my!

What are the best resources and references for a novice interested in modern electrical engineering? [more inside]
posted by clearly on Jan 26, 2013 - 13 answers

What's the best 101 Aruduino kit?

It's been a few years (Almost 5!) since I last sat down to monkey with an Arduino. I now need one for a physical computing class and the number of kits has exploded. What's the best kit for no more than $100? More details inside [more inside]
posted by GilloD on Jan 17, 2013 - 7 answers

Need help finding a small, cheap, Arduino-ready solenoid valve or pump assembly

I need some help building a gadget with an Arduino board. Specifically, I need help finding a way to dispense very tiny quantities of fluid (10 μL) once an hour. The valve assembly is the part I'm having trouble with... [more inside]
posted by dialetheia on Dec 12, 2012 - 14 answers

How do I hack my appliances?

I am interested in the Internet of Things and would like to learn how to make machines, specifically appliances and the like, respond to sensor data, price signals, etc. Where do I start? Arduino? Zigbee? Is it even possible to augment a toaster or refrigerator or washing machine in this way? Specific book and/or website recommendations are appreciated. Thanks.
posted by theexpgen on Aug 15, 2012 - 9 answers

No seriously, a large print Arduino would be great...

Back in the days of yore, my (almost) 77 year old father was quite the geek and maker, but never a programmer. Fast- forward to today and he can no longer work on big building projects and spends much of his time with his iPad and TV. We've been discussing what kinds of "doing" projects he'd like to work on, but the obvious contender of an Arduino is maybe a little difficult as I'm not in Australia to help him out with the programming side of things. What great projects have you known senior geeks to get into? [more inside]
posted by pipstar on May 9, 2012 - 8 answers

No power rails leaves me derailed...

Help save my arduino project: I cannot find any information on how to wire things to a solderless breadboard that does not have any power rails. [more inside]
posted by kitcat on Apr 3, 2012 - 8 answers

I'm making a wedding present for my guitar loving brother, but need your awesome feature ideas!

My brother is getting married! I want to make him the most amazing wedding present. He's into guitars, I'm into Arduinos. Suggested features from other guitar people for the best effect box possible? [more inside]
posted by KeSetAffinityThread on Mar 26, 2012 - 4 answers

Arduino Costumes!

I've got a costume that incorporates LED lights cued to music. I need to re-setup the costume and am trying to find the best Arduino (if possible) tech for them. How do I do so? [more inside]
posted by divabat on Mar 8, 2012 - 7 answers

Arduino Starved For Ideas

What could/should my friend and I build first with an Arduino starter kit or two? [more inside]
posted by cassini on Jan 8, 2012 - 7 answers

Hack Hock Huckleberry

Where can I go to learn about Arduinos in New York City? [more inside]
posted by to sir with millipedes on Dec 6, 2011 - 3 answers

Homemade Sous Vide Controller

I'm interested in setting up a PID and thermocouple to use a slow cooker for sous vide. Most guides are kind of handwavy about this process. What should I look for in a PID? Are parts from Ebay reliable enough, or are they likely to be unreliable (either in terms of holding it near 1-2 Fahrenheit of the target temp or not lasting more than a few projects) or not work? Or what about using an Arduino? [more inside]
posted by mccarty.tim on Oct 18, 2011 - 12 answers

Arduino music sequencer feasibility.

I'm making my first electronics project: a super-simple musical sequencer controlled by an Arduino and SNES Super Advantage. Can you help me out with some logistics/feasibility questions? [more inside]
posted by griphus on Oct 11, 2011 - 2 answers

How can I create a hand-made digital timer?

I want to create a digital timer to run a motor and activate three solenoids in a particular sequence and for particular durations. [more inside]
posted by jsturgill on Sep 28, 2011 - 9 answers

Arduino

What are some cool things I can do with an arduino, Python and stuff I already have, with only a few new parts? [more inside]
posted by mccarty.tim on Aug 16, 2011 - 6 answers

Need help from arduino experts

Arduino! I want to build a very basic network connected battery operated alarm system. What's the best kit for doing so? [more inside]
posted by 3mendo on May 19, 2011 - 12 answers

help me make technology empowering

Help me increase my technology/computer knowledge and resourcefulness so I may help others in my community get the most out of digital tools. Or: How do I apply the DIY/empowering/hackerly approach to computing in a way that benefits others? [more inside]
posted by elephantsvanish on May 7, 2011 - 4 answers

What Arduino projects can I build with a radio or other scavenged household parts?

What interesting projects can I make with my Arduino and scavenged radio parts or other household items? [more inside]
posted by lollusc on Dec 26, 2010 - 7 answers

Looking for hardware/software experiment ideas.

I want to build some kind of simple hardware/software "thing" using Phidgets or Arduino, those systems that have RFID, sensors of various sorts (light, noise, etc.) , LEDs, and analog buttons, dials, GPS receivers, etc. I'm having trouble coming up with a somewhat simple, cool little experiment that is inspiring enough to spend the time doing. Got any ideas for me?
posted by drinkspiller on Oct 7, 2010 - 4 answers

What kind of gadget can a newbie build using the vast inventory of Akihabara?

I need an easy, yet cool-looking electronics project. In around one month, I'll be visiting Tokyo, including a day-long trip to Akihabara. Inspired by this post I think it would be really, really cool if I spent part of that day buying parts in order to create something electronic. Difficulty: I have close to zero experience with electronics. [more inside]
posted by Deathalicious on Sep 28, 2010 - 7 answers

big printer

i plan to make a very big, normal resolution printer from an arduino and some bits and pieces. What should i use for the print head and how? [more inside]
posted by compound eye on Jul 30, 2010 - 5 answers

Mood lights FTW

How do I wire up a bunch of LEDs in my ceiling? [more inside]
posted by fvox13 on Jun 2, 2010 - 9 answers

how to get tinkering

I want to make little machines that do cool things. I've been daydreaming and doing moderate "research" for years and years. How do I make this into reality? [more inside]
posted by elephantsvanish on Mar 13, 2010 - 8 answers

You walked 875 steps, typed 31,221 characters, and found 0 girlfriends today.

I'm interested in self-tracking/home automation. What products (or DIY projects) are out there in the same vein of "Withings" and "FitBit" that will semi-passively track data about myself? [more inside]
posted by TimeTravelSpeed on Feb 2, 2010 - 5 answers

Cool Arduino music projects?

What are some cool arduino music projects, especially guitar effects?
posted by drezdn on Feb 2, 2010 - 2 answers

So MeFi, what do I need to know to bottle lightning?

Help me photograph lightning. [more inside]
posted by pwnguin on Jan 29, 2010 - 5 answers

Help me plan electronics and software for an interactive art installation

Help me plan the electronics and software for an interactive art installation involving buttons and a webcam and a monitor. [more inside]
posted by PercussivePaul on Jan 27, 2010 - 6 answers

I need to find a giood electronics SUPPLY shop in NYC.

Looking for an electronics supply store in NYC. LEDs, resistors, kits. Not boomboxes, televisions and Playstations. Suggestions? [more inside]
posted by GilloD on Jul 15, 2009 - 13 answers

What's the best way for a Crackle Box-type circuit?

What's the best way to make a Crackle Box-type circuit (where the user touches and closes the circuit with their fingers)? [more inside]
posted by itchi23 on Mar 24, 2009 - 4 answers

What Kind of Electric Motors Should I Get?

Where should I look to find good, low voltage electric motors for projects? [more inside]
posted by DMan on Oct 23, 2008 - 18 answers

To the Patent Office I go?

DoesorwhydoesntthisexistFilter: A very simple guitar synth. [more inside]
posted by tmcw on Aug 10, 2008 - 19 answers

Where can I find people who like to know 'how stuff works' in socal?

Where around socal can I meet other aspiring electronic do-it-yourselfers? [backyard imagineering] [more inside]
posted by tarthur on Jul 19, 2008 - 6 answers

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