This circuit with an unusual configuration was found in the January 1974 issue of Radio Electronics magazine. The frequency is given by L1/C1, and the transistors admit equivalents.
This LED light effects circuit is from 1988, but uses common components nowadays. The LEDs are...
This circuit aims to recover electrolytic capacitors by applying currents higher than normal for a...
Integrated signal generator appeared in Radio Electronics magazine in January 1968. The integrated...