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 three-chanel remote control transmitter uses a unijunction transistor as low frequency...
Found in a 1965 Motorola documentation this circuit drives magnetic-type fuel pumps found in cars...
This circuit was found in 1980s Electronic Engineering. Transistors can be modern equivalents. The...