Arduino Skateboard Speedometer

Using an Arduino, it is easy to make a speedometer/tachometer for virtually any man-powered vehicle. I made one for my skateboard that used a small magnet to count revolutions and utilized an LCD display screen.  This Instructable will show you how you can do the same step by step. You will need a few things before we get started. 1) A man-powered vehicle (I will be using a skateboard) 2) An Arduino 3) A pl ...

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Arduino String Instrument

Sure you can use LDR's, potentiometers and buttons to generate sounds, but what about strings? When I began thinking about an Arduino string instrument, I realized what I wanted to create was a soft potentiometer.  I found my inspiration from Hannah Perner-Wilson's Fabric Potentiometer http://www.kobakant.at/DIY/?p=543. Step 1: Parts [box color="#985D00" bg="#FFF8CB" font="verdana" fontsize="14 " radius="20 ...

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Interfacing a Digital Micrometer to a Microcontroller

We had a project that required connection to a digital micrometer with a data output jack. The idea was to connect a microcontroller to the micrometer, to read the measurements and make decisions based on the readings. The micrometers that we used are made by Mitutoyo, and have a funky 52 character data stream in reverse bit order. The microcontroller we chose is the Arduino, and we used a 4D systems uVGA-I ...

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DIY Arduino Board Water Meter

Working with the interaction design team, a bunch of us at Teague have been tinkering with measuring water, analyzing usage data in realtime to affect behaviors, and storing it to see patterns over time. At the heart of the exploration was a need to cheaply measure water from the tap.  Water meters vary quite drastically in price (from $250+ for industrial grade sensors to $6 for garden hose attachments tha ...

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Ultrasonic Tape Measure using Arduino

Have you ever wanted an ultrasonic tape measure, like this Stanley? (See picture). Well, I have but then I am a Lazy Old Geek. I don’t really need one but I thought I’d try to make one. And naturally, I thought of an Arduino. August 2012 update: I just found out the software used in this Instructable does not work in the latest Arduino environment, 1.0. I think it is the LCDKeypad library but haven't found ...

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Frankenstein Laser Engraver

This Frankenstein Laser Cutter was built out of an old scanner and printer. The whole thing evolved around the instructable of Groover and his 'Pocket Laser Engraver'. This is a Making-Of. Although a lot, if not everything, of the mechnical construction requires ingenuity I tried to document the complete build process as much as I could. Every scanner and printer mechanics are different so this could not be ...

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Programmable Temperature Controller + Hot Plate

Heating things up is one of the most performed tasks in a lab. Quite a lot of times it is not enough to simply hold something at a certain temperature, but the rate at which something is heated and for how long is just as important. Especially when you try to develop catalysts for chemical processes, the temperature program and exact temperature control is crucial and you probably do not want to stay in the ...

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Arduino SD Cards and Datalogging

This is my first in a series of more advanced Arduino tutorials. [box type="note" color=" #202020 " bg="#ffbb00 " font="verdana" fontsize="14" radius="20 " border="#000" float="right" head="Attributes"]Thanks to Jeremy , for this articles[/box] Now that we’ve covered the basics in tutorials 1-10 (you have watched them all right!?), it’s time to start pursuing some more complex projects! In this episode, we’ ...

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Memsic 2125 Accelerometer using Arduino

The Memsic 2125 (datasheet) is a two-axis accelerometer capable of measuring acceleration up to plus or minus 2g. It has a simple digital interface: two pins (one for each axis) emit pulses whose duration corresponds to the acceleration of that axis. By measuring the length of that pulse, in microseconds, using the Arduino's pulseIn() function, it is possible to determine the rate of acceleration and to use ...

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An Arduino Powered (Scale) Speed Trap

After a break of around two decades I've recently started building a model railway. One of the issues I've faced is trying to work out how fast I should be running the trains so that their speed reflects reality given the scale at which they are modelled. I'm guessing the details won't interest everyone reading this post but if you are interested then I've blogged about this from the model railway side on o ...

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Quasi real-time oscilloscope using Arduino

Recently I was reviewing one of my oldest project, and decided to “refresh” previous design by taking full advantage of the new arduino Leonardo board.  Based on AtMega32U4, which include PGA (programmable gain amplifier), oscilloscope’s  analog front end doesn’t require external OPA this time, end could be build in 1-2 hours on prototype board, using 5 resistors, 5 capacitors and one IC. Short specificatio ...

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How to Make a Tactile Feedback Compass Belt

Have you ever wondered how migratory birds manage to have such an amazing sense of direction despite being so generally clueless? They can sense the Earth's magnetic field with what is basically a compass built into their body. Wouldn't it be cool to feel what that's like? The following instructions are loosely based off of a research paper by the (German) OFFIS Institute of Technology, or Oldenburger Forsc ...

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