This high-precision circuit was found in documentation from the 1990s. The integrated circuit is an LM111 or another in the series. The circuit has TTL output and can function as a shield.
This circuit is from an English publication from 1978, but it can be assembled with BC548 for TR2...
This simple voltage regulator with FET was found in American documentation from the 1980s....
This circuit was used to regulate the speed of small DC motors of cassette recorders. However, if the...