This small audio amplifier was found in an American publication in 1975, The integrated circuit used is rare today. The circuit was used in portable receivers of the time and other applications.
We found this circuit in an English publication from the 1980s. The circuit uses current...
This circuit uses common transistors for a fault indicator that turns on an LED and provides an...
This high current switching stage was found in a 1967 EEE. The power transistor is from that time....