This circuit was found in a General Electric documentation from 1966. It uses discrete components of the time that can be replaced by modern equivalents.
This useful power supply was found in an 1985 Italian publication, but can still be assembled...
This headphone amplifier has good gain and high input impedance. The circuit is from Electronics Now and...
This CMOS integrated alarm was found in the July 1992 Radio Electronics magazine. The circuit has...