The auto door control circuit

Published:2011/6/10 2:20:00 Author:qqtang | Keyword: auto door, control circuit | From:SeekIC

In the figure is the auto door control circuit. The human body movement detection is done with the new heat infrared probe module HN911. VT1 is the time delay control, by adjusting potentiometer RP1, the delaying time can be changed. The photocoupler MOC3020 is functioning as the D/A current separator. When there is no one walking, HN911 output terminal 1-pin is in a low LEV, VT1 controls the signal output, the dual-way thyristor Vh is closed, the loading motor is not working, and the gate is in the closed state. When someone is getting close to the auto gate, HN911 is detecting the infrared energy of human body.



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