This simple power supply circuit triggers when the light on the LDR reaches the level set on the potentiometer. The circuit is from an Electronics Now from July 1995.
This circuit was obtained from an 1974 Everyday Electronics magazine. The circuit is still current as...
Found in a 90s Popular Electronics, this circuit uses components from that time, for a...
The output of this circuit can be coupled to a radio control transmitter to perform a...