Based on the well-known LM3909, this LED pulser circuit was found in American documentation from the 90's. The power supply is only 1.5 V.
This ground-based circuit was found in 1990s American documentation. The transistor can be any...
We found this circuit in a Radio Electronics issue from November 1976. The circuit is for vehicles of...
With this circuit it is possible to obtain a voltage modulated in amplitude with a maximum current of...