Arduino EMF detector
Use an Arduino microcontroller to sense invisible electromagnetic fields using wire, a resistor, and an LED.
Arduino
Quiz-O-Tron 3000 Arduino quiz lockout system
If you’re an aspiring Alex Trebek with some Arduino skills, you should check out RoysterBot’s Instructable on how to make a Quiz-O-Tron 3000, an electronic quiz contestant lockout system, which allows contestants to “buzz in” during trivia games. He used it at a holiday party and therefore needed something sturdy enough to withstand the hand […]
New from O’Reilly Media: Building Wireless Sensor Networks
Building Wireless Sensor Networks
with ZigBee, XBee, Arduino, and Processing
Nixie tube reverse geocache box
Arduino forum member RickP posted his awesome-looking reverse geocache box, which unlocks to reveal its contents only when it’s in a certain place on the globe. He uses an Arduino, a GPS sensor, and a trio of nixie tubes, which indicate the box’s distance from that special spot. When the button is pressed in that […]
Using a voltage reference to improve sensor measurments
The folks at Little Bird Electronics have a nice tutorial about how and why to use the analog reference input on a microcontroller to improve analog voltage measurements.
Android controlled cat feeder
I’ve got to build one of these. I usually leave out gobs of food in a couple of bowls expecting my cat to exercise his free will, but this seems like so much more fun. Usually it’s the cat that’s playing the games. And who isn’t interested in Arduino, Android, and 3D printed parts? It’s like some perverse Internet-connected feline vending machine, but instead of some elaborate scheme involving payment gateways and QR codes, it relies on toxoplasmosis-induced mind control. Who’s the robot now?
Twitter Monkey
Some people aren’t content with your run-of-the-mill blinking lights. Take, for instance, this Arduino-powered Twitter Monkey from maker Pete Prodoehl. He could have had his script send out an audio alert like everyone else, instead he chose to create this animatronic monkey using an Arduino and a couple of servos. Every time it sees a keyword it goes bananas, flapping its arms about like any excited monkey would do. It may not be your cup of tea if your a nervous person, but it sure does beat your average blip.
