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.
Found in an Electronic Design from the 80s, this circuit generates a 500 Hz signal and can be used...
This circuit is from the 1972 RCA Linear Integrated Circuits Manual, but it can be made based on...
At each switch position, a diode is connected in series with the motor, thus causing a small...