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Capacitive Touch Sensor: Learn Electronics with a Spooky Halloween Project

Halloween is a great time to put your engineering prowess to work on a fun project. For this special Halloween project, we built a spooky candy bowl that lights up when an unsuspecting trick-or-treater reaches in. Using a microcontroller and some aluminum foil, we can build a capacitive proximity sensor that detects when a person's hand is nearby. For more details, explanations, and source code, please see: http://www.nerdkits.com/videos/halloween_capacitive_touch_sensor/

Tags: analog, atmega168, avr, capacitive, circuit, comparator, decay, dielectric, diy, electric, electronics, exponential, field, halloween, jack-o-lantern, jackolantern, learn, led, microcontroller, nerdkits, permittivity, project, proximity, pwm, rc, sensor, strength, timer, touch
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