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 suggested by Siliconix in a 1980s publication. The circuit uses components from the time...
This amplifier with two FETs in direct coupling (cascode) was found in a 90s Popular Electronics. The...
This circuit uses the 7815 regulator to obtain a voltage for motor control num shield for PC. The...