Originally created to power an 80's RTTY printer, this circuit can be used in other applications. The circuit is from an Amateur radio of the time.
The difference between this circuit and the previous one is that it uses PNP transistors. The...
The purpose of this circuit is to warn when a door is opened or when left open, feeding a buzzer of...
When activated, this relay remains activated for a moment, generating a pulse in the load. The...