Touch Switch (CB10924E)

Details
Written by: Newton C. Braga

 

This circuit was obtained in a 1991 Electronics Handbook. The publication no longer exists, but this circuit is still useful by activating an LED when touching a sensor board. In place of the LED, a relay can be used, and the transistor can be the BC548. The power can be between 5 and 12 V.

 


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