GUNSHOT_COUNTER

Published:2009/7/13 20:57:00 Author:May | From:SeekIC

Loudspeaker serves as microphone for picking up loud noises such as from blasts, noisy auto engines, and children on roller skates. Each input shock wave drives grid of 1U4 negative and fires 1D21 strobotron, thereby dumping charge on 2.mfd capacitor from plate to ground through counter. Operates at up to 40 shots per second, fast enough for most automatic weapons fire.-R. L. lves , Shot Counter Uses Strobotron, Electronics, 31:33, p94-96.



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