The name of this circuit comes from the appearance of its characteristic curve shown next to the diagram. The circuit was found in a Popular Electronics from the 90s.
This circuit was found in old American documentation. Transistor is general purpose and relay is...
This simple alarm with latching uses a relay as the main element. The circuit is from a Radio...
This circuit is from an Italian publication called Fare Elettronica from 1987. What we have is an...