This circuit was found in a Philips documentation from 1966. Its purpose is to drive the solenoid of an electric typewriter of the time.
This circuit, found in documentation from the 1980s, uses an operational amplifier from that time....
This low frequency sinusoidal oscillator was obtained in documentation from the 1970s. Operational...
This circuit was found in a 1980s documentation. It is intended for remote vibration monitoring...