keyMote: a simple wireless remote for computers

Note: this post about an electronics project has been sitting as a draft since 2011 so some of its content might appear outdated. Regardless, I’ve been using the device since then so I figured I should commit it to posterity. To my computer, its simply a USB keyboard, nothing less, but to me its a remote I can use on any platform with no line of sight. I decided to name it the keyMote. Sounds a bit odd to m ...

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Cutting Mylar Solder Stencils from ExpressPCB and EagleCAD Files

In this post I’ll be going over how to cut out solder stencils for both ExpressPCB and EagleCAD designs on a laser cutter. I recently had a need to create some stencils from both of these programs and spent quite a bit of time at the Dallas Makerspace working with their laser cutter to get the settings just right. I’ll be cutting some designs that are mostly 0603/0805 package sizes, so don’t expect ultra-ti ...

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Impact, vibration and ultrasound sensing with PVDF Piezo sensors

This post is about an interesting, low-cost sensor that doesn’t need much processing to use, and has some unique characteristics – a PVDF (polyvinylidene difluoride) Piezoelectric sensor. The sensors looks like a small strip of plastic, and can be used for detecting movement or vibrations even into ultrasound. Such devices can help sense in many practical, real-world scenarios. They are extremely sensitive, ...

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PiTFT Weather Station

More tinkering with the wonderful Adafruit 2.8″ Touchscreen TFT module (PiTFT) for the Raspberry Pi.  This time a weather station drawing data from weather.com. Luckily there’s a wonderful python module to extract data from three popular weather services; python-weather-api supports NOAA, Yahoo! Weather and weather.com.  This makes life so much easier. Download the module and install in the usual way; there ...

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Raspberry Pi Alamode CNC Controller

This is my first attempt at an instructable. I hope it helps someone else. Switches and Lights and fans, oh my... I bought a CNC machine some time ago and I was never happy with it. It used a traditional parallel port controller and of course no modern computers have those. So it was always a point of frustration. I used an old Pentium based computer and ran LinuxCNC on it for a while but was still not happ ...

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ISS Overhead

The ISS Overhead is an ambient display that glows whenever the International Space Station is flying overhead. It is designed to act as an occasional reminder that there are people living and working in space! This project should take you somewhere between 2 hours to an afternoon to complete. It assumes you know how to solder, and are somewhat familiar with Electric Imp. If you haven't worked with Electric ...

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Glitchbox – audio sequencing music instrument

Amanda Ghassaei has published on her website an interesting project: the Glitchbox. This instrument can do two different things: -it can be used as a standalone audio device, with the audio data stored in the arduino’s flash memory -it can also be used to sequence MIDI through a usb connection to your computer There is also a detailed  instructable with all the information needed.   For more detail: Gl ...

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FIND V2.0 – Never lose anything! Share or track via App

Keep losing things? Want to share & track belongings with friends? Locate bags/keys in an instant? Scheduled to ship in JUNE! #FIND Kickstarter special pricing only during the campaign! MSRP will be $24.95 per FIND tag later. Back us now! Shipments scheduled in JUNE! What does the FIND tag do? The FIND is the best track & find tag which can be used to reliably prevent losing or misplacing belongings ...

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FM Modulation/de-modulation Circuit

I got the idea for this circuit from one of my professors. That design wasn't meant for passing frequencies high enough to be able to pass an audio file, e.g. 500Hz+, so I built this by modifying the carrier and signal frequencies, using only the Digilent Analog Discovery and the Analog Parts Kit. It should be noted that this circuit is primarily for educational purposes. Also note that there is no radio tr ...

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The Nanite 85

Recently, Olimex anncounced the Olimexino 85s, claimed to be the “World’s smallest Arduino ever“. Now, that looks like a challenge. I guess it is about time to show off what has been on my desk since some time last year: The Nanite, pictured below. I designed this board for fun after the Digispark and, subsequentally, the Adafruit Trinket were announced. The motivation was to have my own ATtiny85 based deve ...

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DIY Temperature & Humidity & Smoke Detector

ICStation team introduce you how to DIY this temperature & humidity & smoke alarm system based on ICStation Mega 2560 compatible with Arduino.The working voltage of this system is DC5V.It can measure the current temperature, humidity and smoke. It can display real-time data by the 1602 LCD and can realize the sound and light alarm when in the dangerous temperature and humidity. It is a simply and ea ...

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Build Temperature & Humidity & Smoke Detector Alarm System Based on Arduino

Project Summary: Build temperature & humidity & smoke alarm system based on ICStation Mega 2560 compatible with Arduino( Cost is USD32.39 ONLY) . The working voltage of this system is DC5V.It can measure the current temperature, humidity and smoke. It can display real-time data by the 1602 LCD and can realize the sound and light alarm when in the dangerous temperature and humidity. It is a simply an ...

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