This circuit with current up to 100 mA according to the transformer was found in the Radio Electronics magazine of October 1991. The regulation is done directly by the zeners.
We find this circuit in the 80s used integrated circuit manual itself. The integrated circuit is not...
July 2017 - Microchip's new MCP9V91 operational amplifiers with input offset and low drift voltage...
With this circuit, of a 1977 Radio Shack documentation, it is possible to demonstrate the...