This circuit was found in General Electric documentation from 1964. It makes use of a PUT, called the PNPN planar key at the time. The circuit has two supply voltages.
This simple transistor tester uses a common 3 mA analog instrument that has its scale changed as...
This Texas Instruments circuit is from the 80's. However, it can be implemented with modern...
This circuit shows how to trigger and shut down an SCR using common pressure switches. The circuit...