Automatic hand dryer 3

Published:2011/5/16 21:46:00 Author:Nicole | Keyword: hand dryer | From:SeekIC

The circuit work theory This automatic hand dryer circuit is composed of power supply, optical control circuit and control implement circuit, the circuit is shown in the figure 9-126. The power supply circuit is made of depressurization capacitor C1, bleeder resistor R1, voltage stabilizing diode VS, rectifier diode UD1 and filter capacitor C2. The optical control circuit is made of indicator light HL, light dependent resistor RG, resistor, capacitors C3, C4, potentiometer RP and time base integrated circuit IC. The control implement circuit consists of relay K, diode VD2, heating wire EH and fan motor M.



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