We found this circuit in a 1971 documentation. The circuit can be assembled with more modern transistors such as BC548 for Q1, BC558 for Q2 and BD135 for Q3.
We found this circuit in an English publication from 1980. The maximum output current depends on...
This sophisticated circuit for the 90s car was found in the 1993 edition of Radio Electronics...
This circuit was found in a French documentation from the 80's. The circuit must be powered by a...