Single metal chip touch switch circuit

Published:2011/7/9 1:57:00 Author:Fiona | Keyword: Single metal chip | From:SeekIC

The circuit shown in the figure only uses a touch metal chip,the circuit uses two forty-two input terminals(internal has four identical, with two input terminals) schmitt trigger 4093(such as CD4093,TC4093 etc.).Usually the output terminal's 3 pin of IC2-a is low,light-emitting diode LED1 can not shine,when touching metal chip, the output terminal changes into high level to make the LED1 turn and light.



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