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.

Leave Comment

characters left:

New Circuits



Popular Circuits

Digital Calender Circuit
Quick Counter For Young Children
Simple Audio Filter Analyzer Circuit
Single 10 Shunt Fed Hartley Oscillator for 80 meter CW
AFSK Modem
XenonS130 Reference
Host computer automatic temperature control circuit
Door light emitting logic circuit with CD4069