Carlos demonstrates how to build a simple IR detector. Looks like it could be done for a dollar or two. “An IR signal is “seen” by a reverse biased IR diode which produced an electrical signal according to the light intensity. This signal is then amplified trough a transistor and used to power an ordinary LED. This means that the LED will light up when the IR diodes receives some
Here is a creative way to carve your pumpkin next year! Have a look at this Instructable for more details. “Pumpkin carving with the Tesla CD Turbine, Steampunk Edition. New design of the little turbine made from CD’s gets put to the test. Will the barely held on, magnetically-coupled, spinning Skilsaw blade, cut through the tough and messy flesh of the poor, tearful Pumpkin??” Thanks Rick
Congratulation to the last contest winner. I have got lots of good feedback for this flashlight, hope the winner enjoys it. 🙂 This contest will run for this weekend only (November 10- 11, 2007) . Ending time is based on central standard time. To enter, identify the item pictured above and give an example of what can be done with it. Please do not give the answer in the comments.
This LEGO NXT robot is sure to be a hit at your next outdoor fireworks show. Just line it up and let it go. “This autonomous NXT robot will light multiple fireworks in a sequence – while the family sits back and watch the display!! It uses a MINDSTORMS NXT, two light sensors (one for navigation and other to detect a lighted fuse) and an Ultrasonic detector (to adjust
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The Gamerator is one heck of a gaming machine… And just think when you get thirsty all you have to do is full your mug from the center of the game system! “Introduce yourself to THE GAMERATOR … the ULTIMATE gaming machine in the world of home entertainment. Pre-loaded with 187 licensed classic arcade games … the Gamerator has everything from Tecmo Bowl to Pac Man, Street Fighter to Galaga,
The University of Washington is working on an amazing voice recognition system called VJ which stands for Vocal Joystick. No it doesn’t do text to speech like everyone else is doing, it allows simple vocal sounds control your computer mouse. After watching the videos it looks much easier than the other technologies I have seen in the past. More videos after the jump. “The goal of this project is to
