Suggested by an American publication, this circuit has 5 operating conditions indicated in the diagram. The circuit can be designed based on modern equivalent transistors.
This circuit was obtained in an old documentation for radio amateurs. The circuit is a sound...
We found this circuit in a 1980 publication. It can be applied to Triacs of the TIC series and the...
This alarm circuit has a trigger delay system. The circuit was found in a Popular Electronics of the 90s....