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How to Make the Metal Melter
Sheet Metal Brake
How to Make a Cool and Compact Fire Pit from Half a Sheet of Steel
Full color LED cyber suit! (additional instructables for NES Powerglove control, Live Audio EQ,etc.. to follow!)
light to sound
(w/ Video) Basic Arduino Robot, Light Seeker!
DIY Touch Sensor
Arduino Basics: PIR Sensors
Arduino Controlled Motion Sensor
Arduino IR sensor and LEDs
Arduino - Ultrasonic Sensor with LED's and buzzer
Simple Arduino and HC-SR04 Example