This circuit was found in February 1976, Radio Electronics magazine. The circuit is powered by 12 V and consists of an intermittently triggered timer.
This circuit uses old germanium transistors because it was found in an old magazine from 1973....
This logic level indicator also indicates the presence of pulsating signals through a third LED. It...
This circuit is from the 1990 Motorola Linear Databook, which can be developed with more modern...