SAR is a robot that uses a sound activated circuit from allelectronics.com to run a 1.5-3vdc motor with a weigth on it to vibrate and move when it hears a sound. Also SAR has three blinking red LEDs for looks and is powerd by two AA batteries. Sar didnt cost much to build all I had to buy was the
sound activated circuit and the three red blinking LEDs everything else came from my junk heap.
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