This is the version of the previous circuit for vehicles with positive ground. The circuit is from a Radio Electronics from December 1976. A siren is included.
This circuit is intended to increase the width of a pulse. The circuit is TTL and can be used as a...
We found this circuit in an American 1980s documentation. The transistors can be equivalent as BC548...
This circuit was found in Sprague Electric documentation from the 90s. The circuit uses a...