Class B Audio Stage (CB25704E)

This small two-transistor amplifier was found in the April 1994 issue of Electronics Now magazine. This stage is powered by a symmetrical source.

Undervoltage and overvoltage indicator (CB5073E)
This circuit that uses only transistors indicates when the voltage in the circuit has the voltage...
Robot Bug (CB25466E)
This is the circuit of a robot published in the June 1992 issue of Radio Electronics magazine. The sensors...
Tone Decoder (CB5146E)
This circuit was found in a 1980s documentation. It decodes by identifying a certain frequency tone...