This configuration with the LM111 was found in your factory manual. The circuit can be implemented with modern operational equivalents. The power supply must be symmetrical.
Found in a Radio Electronics we have in the figure a circuit to disconnect an SCR with direct...
This Harris circuit from the 90's is intended for recording old EPROM memories. The circuit uses...
This circuit simulates a unijunction transistor trigger with two bipolar transistors. The circuit...