Found in American documentation from 1968, this circuit uses both diodes and a neon lamp to generate a 4-step ladder. Observe the signal voltage.
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...