Infrared automatic hand washing device 5

Published:2011/5/16 22:16:00 Author:Nicole | Keyword: hand washing device | From:SeekIC

The circuit work theory This infrared automatic hand washing device circuit is composed of power supply, infrared transmitting circuit, infrared receiving process circuit and control implement circuit, the circuit is shown in the figure 9-123. The power supply circuit is made of power switch S, fuse FU, power transformer T, bridge rectifier UR, capacitors C1, C2 and three terminal regulator integrated circuit IC1. The infrared transmitting circuit consists of not gate integrated circuit IC3(Dl、D2), resistors R1-R4, capacitor C3, transistor V1 and infrared LED VL. The infrared receiving process circuit is composed of infrared photosensitive diode VD2, resistors R7, R8, potentiometer RP, capacitors C4-C7 and infrared process integrated circuit IC2. The control implement circuit is made of resistors R5, R6, diode VD1, transistor V2, solid state relay KN and electromagnetism water valve YV.



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