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.
This circuit was found in Radio Electronics magazine from September 1959. The circuit emits a loud...
This circuit was based on Maxim's MAX4374. The circuit senses the current in a 0 to 20 V line and...
This simple power supply for transistors was found in documentation from the 1940s. The...