We found this circuit in an American publication from the 1990s. The circuit has a Darlington stage to drive a high-power LASER diode.
This circuit was obtained from Radio Electronics from the 90s. The infrared sensor is of an...
The sensor in this circuit is a common transistor like the BC548. The circuit is from a 1979...
Although the UAA170 is not a common component today, the circuit shows how it can be used in a...