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.
This is a Japanese commercial circuit found in a 1967 documentation. The transistors are from the...
When switching on, the output voltage of this regulator rises slowly until it reaches 15 V. The...
This simple indicator is for 12 batteries, just adjust the trigger point in the trimpot. The...