Without regulation, this basic circuit has the output current, and voltage determined by the transformer. The input can be 110 V and 220 V if the transformer used is of the indicated type.
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...