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 10 mA microammeter circuit can measure currents of 50 uA. The circuit is from a publication from the...
This circuit charges a battery to power a flashlight at night. The circuit is from an English...
We found this transistor siren in an old English publication. The transistors are from the era,...