This simple low current circuit was found in a Radio Electronics magazine from August 1960. The circuit does not use transistors in regulation, but only zeners directly.
This circuit can supply voltages from 0 to 12 V with currents up to about 5 A, with the adjustment made...
This circuit is from the 80s. The integrated circuit used is uncommon as is the transducer....
This power supply is indicated to power small loads up to 30 mA. The original output voltage is 6...