This circuit was found in an old documentation, being able to generate signals of frequencies in the range of 50 to 100 MHz. The components are of the time.
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...