We found this circuit in Radio Electronics from the 90s. The components are current. The sensor is a common general-purpose transistor. The connection to the sensor is made by twisted pair.
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...