This signal injector and tracer (follower) was found in an old American documentation. The transistors can be general use and power is made with one or two common cells.
An article in Radio Electronics magazine from November 1962 taught how to connect two common...
This circuit triggers when the test leads are exposed to moisture or water. The circuit is from a...
This source gently applies the voltage to the load, causing it to rise slowly, thus avoiding...