We found this circuit in a 1997 documentation. It is possible to automatically reverse the direction of rotation of a three-phase motor. The circuit uses WEG timers and contactors.
This circuit is from an English technical documentation and can be implemented with BC558...
This interference rejection circuit for telegraphy was found in a 1980s documentation for radio...
This circuit is suggested by Motorola, employing a photodiode with housing designed for coupling in...