We found this battery eliminator in a Radio Electronics magazine from August 1974. The transistor must be equipped with a heatsink and other voltages can be achieved by replacing the zener.
The circuit shown consists of a bilateral constant current source with an operational one that...
The sound of this experimental musical instrument is produced by the movement of the hand in front...
We found this circuit in a Japanese 1968’s documentation. The circuit makes use of transistors from...