This power source was found in a 1969’ Electronics World. The version is too sophisticated by the current it supplies and can be implemented with modern transistors.
This circuit has already been presented from other manufacturers' manuals. This one, specifically, is from...
September 2016 - Supercapacitors of 10F to 100F in 3 V from Eaton can now be purchased from Mouser...
This simple circuit was obtained in a Portuguese publication in 1979 but can be easily assembled with...