Automatic hand dryer 5

Published:2011/5/16 21:12:00 Author:Nicole | Keyword: hand dryer | From:SeekIC

The circuit work theory This automatic hand dryer circuit is composed of power supply, infrared control circuit and hot air generation circuit, the circuit is shown in the figure 9-128. The power supply is made of power supply switch S, depressurization capacitor C1, resistor R1, bridge rectifier UR1, filter capacitor C2 and voltage stabilizing diode VS. The infrared control circuit consists of current limiting resistor R2, infrared LED VL, infrared photosensitive diode VD1, potentiometer RP, electronic switch integrated circuit IC, diode VD2 and relay K. The hot air generation circuit is composed of K often open contact, heater EH, bridge rectifier UR2 and fan motor M.



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