Published:2012/11/20 1:27:00 Author:Ecco | Keyword: Homemade, fast hand dryer | From:SeekIC
When it is illuminated, the IC's pin 1 is in high potential, TWH8751 is cutoff, J loses power, J1-1 disconnects. When the hand gets into and blocks the light, D2 shows a large resistance, pin 2 of the IC is in a low potential, the IC output end gets conduction, J1-1 is turned on, the electric wire and the motor are energized.
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