Photocell memory switch for AC power control

Posted on Feb 11, 2013

Provides remote control for ac-powered devices by using the beam of a flashlight as a magic wand. The important aspect of this gadget is that it remembers. Activate it once to apply power to a device and it stays on. Activate it a second time and power goes off and stays off

Photocell memory switch for AC power control
Click here to download the full size of the above Circuit.

It consists of a combination of a high-sensitivity photocell. a high-gain IC Schmitt trigger, and an impulse-actuated latching relay.

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