This integrated amplifier was found in a non-existent British magazine from 1975. The used integrated circuit is still popular and the mono bridged version can provide 36 W output power. 4 A.
This circuit is from an American publication of 1978. It can be assembled with modern transistors, since...
The electrostimulator or electronic massager consists of a circuit that produces high voltage...
This circuit can send signals in both the VHF and FMN bands with a range of a few tens of meters. The...