This simple circuit found in a 1968 EEE was intended for data transmission over the telephone line. The components are from that time, some are uncommon today.
This circuit is from old American documentation, but the components used can still be found quite...
This FM transmitter was found in a 1997 magazine but can still be easily assembled. 18-wire in the...
This circuit uses two diodes in a doubling configuration to receive medium-wave range signals. The...