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 General Electric documentation from 1964. It makes use of a PUT, called the...
The circuit presented is suggested by National Semiconductor in its Linear Applications Handbook. The...
This is a small transistor receiver for the medium wave range made in Japan in the 1960s. The...