Found in the March 1989 issue of Radio Electronics magazine, this circuit is used to test printer and other cables. The indication is made by LEDs.
The L1 and L2 coils of this receiver depend on the waveband you want to receive. Normally L2 has...
This sensitive AM radio doesn’t need external antenna, picking easily local stations. The output...
This circuit causes the neon lamps in a set to flash randomly. Capacitors determine the speed of...