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.
This circuit was found in an American publication from the 1980s. The circuit generates pulses from...
This circuit is from 1977 Radio Shack documentation. The frequency depends on the capacitor. The...
Found in a 1993 Electronics Experimenter Handbook, this circuit uses a multimeter to measure...