Wireless Switch Circuit PCB

Posted on Feb 5, 2014

The circuit diagram shown here is a very sensitive wireless relay switch that can be used to control the working of home appliances like flush system, hand dryer or else. The wireless switch described here needs no remote control for its working. You only want to move your hand between the infrared LED and photo transistor to control the device or

Wireless Switch Circuit PCB
Click here to download the full size of the above Circuit.

load. The circuit is built around an IC CA3140, IRLED1, photo transistor and other discrete components. The working of this circuit is very simple. In order to switch on the device or appliance you simply interrupt the infrared rays falling on the photo transistor through

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