This circuit was found in a 1980s documentation. The circuit uses common components having an output of 10 Hz per centigrade degree of variation. The sensor is a transistor.
This circuit uses one of the first comercial transistor and is from a 1958’s magazine. Tone...
This circuit is intended to indicate the operation of transmitters with powers above 5 W. The...
Emitt This crystal-controlled oscillator can generate signals from 100 kHz to over 30MHz. The...