This Power supply sources from 500 to 1,000 mA according the transformar and was found in a publication of the year 1958. The diodes can be now the 1N4004 and the transistor should be mounted on a heatsink.
The focused circuit was found in the National Semiconductor's Linear Applications Handbook of...
This circuit was found in a 1964 Electronic Design. The circuit makes use of transistors of the...
This circuit was suggested by Texas Instruments in a 1980s documentation. The transistor must be...