This simple continuity tester consists of an oscillator found in the 1983 Electronics Experimenter Special projects magazine. The circuit is powered by a single battery.
Found in Linear Technology documentation from the 1980s, this circuit has an accuracy of 0.01%....
This amplifier circuit for listening was found in a book by Hugo Gernsback from 1960. The...
This circuit is from a current regulator up to 1 A, ie a constant current source. The LM320...