This circuit was originally designed with the operational 747 which is rare today. However, the circuit is valid for any operational that must be powered by a symmetrical source.
This circuit was found in a 1977 documentation. It limits the voltage from a source using zener...
This circuit is from 1977 documentation, but can be assembled with BC548 for Q1, Q2 and Q4, BC558...
This very simple circuit uses two stripped wires as sensors that must be at the drive level. The...