Bathroom automatic hand dryer circuit


Posted on Mar 28, 2007

Bathroom automatic hand dryer circuit. Figure, LED to LED tube takes; VT is a photosensitive transistor, LED and VT composition infrared opto tuner, as a signal sensing clamor,


Bathroom automatic hand dryer circuit
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1WH8778 switch integrated circuit as the control element. When the optical coupler hands in the following, feet high potential TWH8778 switch integrated circuit is turned almost 1.6V, current through R, double trigger to make it crystal f field management VTH conduction, far infrared heating line identified EH is working hand drying. After leaving the hand, automatic cut-off switch circuit, EH to stop working.




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