This nonlinear gain circuit was found in a 1965 Electronic Design. The configuration can be used as a basis for modern designs with equivalent transistors.
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...