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.
Found in an Electronics Now from the 90s, this application uses an integrated circuit from the...
This circuit can be applied to other 3-terminal regulators and equivalent transistors can be used....
This circuit was found in an old Electronic Design used to apply digital signals to an analog...