Photocell memory switch for AC power control

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

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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