Automatic hand dryer 1

Published:2011/5/16 21:25:00 Author:Nicole | Keyword: hand dryer | From:SeekIC

The circuit work theory This infrared automatic hand dryer circuit is composed of power supply, infrared transmitting circuit, infrared receiving amplifier circuit, delay circuit and air heater control circuit, the circuit is shown in the figure 9-124. The power supply is made of power supply switch S, depressurization capacitor C1, resistors R1, R2, voltage stabilizing diode VS, rectifier diode VD1, filter capacitor C2 and power indication LED VL1. The infrared transmitting circuit is made of not gate integrated circuit IC(D1-D5) internal not gate D1, D2, resistors R3-R6, capacitor C3, transistor V1 and infrared LED VL2.



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