This 80's Exar circuit has a carrier detector for frequencies up to 500 kHz. The circuit uses a company 567 which is still a common component.
This digital touch volume control was obtained in a 1988 publication. Each touch of the sensor...
Found in 1965s General Electric documentation, this circuit is intended for the control of servos...
The transistor of this power source can be the TIP31 or TIP41 which must be equipped with a heat...