This simple tester was found in a Popular Electronics from the 90s. The circuit is powered by two 9 V batteries since it requires a symmetrical source.
This circuit was found in a Radio Electronics issue from May 1989. Please note that it may not...
The circuit in the figure is very interesting because it simulates an SCR triggered by light. When...
The circuit shown is a suggestion by National Semiconductor in its 1994 Linear Applications...