Human body induction switch circuit diagram

Published:2011/8/17 21:03:00 Author:Jessie | Keyword: human body , induction switch | From:SeekIC

When the switchSWis on the automatic position, RE - 200B will attune the infrared that human releaseand convert it to faint signals sent to HT7610B's pin 11.With internal level 2 amplifier and resistance, pin 20 outputs 0.3 ~ 3 HzAC signal, when this signal's amplitude is over 2V,pin 2will output a square-wave voltage that synchronous with AC power voltage todrive bidirectional triode thyristorfor zero trigger conduction, then the light is turned on. VR1 is the delay time adjustment potentiometer, afetr lamp beinglit, lights turning off time delay can be adjusted between8-6 seconds; VR2is the light and dark adjusting potentiometer.



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