Found in 1967 documentation, this circuit makes use of period transistors and drives a common light bulb. Nothing against it being adapted to use LED.
This step uses germanium transistors such as the AC151, GE2, and others having been found in a...
This circuit was obtained in an Electronic Design from the 80's. It has the adjustment of the gain...
We found this high input impedance, low output impedance amplification stage in the October 1993...