Automatic hand dryer 4

Published:2011/5/16 21:54:00 Author:Nicole | Keyword: hand dryer | From:SeekIC

The circuit work theory This automatic hand dryer circuit is composed of power supply, infrared transmitting circuit, infrared signal process circuit, electric heater circuit and fan control circuit, the circuit is shown in the figure 9-127. The power supply circuit is made of fuse FU, power switch S, power transformer T, rectifier diodes VD1-VD4, filter capacitors C1, C5, C6, resistor R13, power indication LED VL1 and three terminal regulator integrated circuit IC3. The infrared transmitting circuit is made of infrared LED VU, resistors R7, R8, capacitor RP4, capacitor C4 and time base integrated circuit IC2.



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