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.
This circuit is from a publication by Newton C. Braga in the United States. The transistor can be...
The circuit is from the Texas Instruments optoelectronics manual. The capacitor depends on the...
This circuit was found in an application note of the LTC1164 from Linear Technology of the 1990s....