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 1967 Electronics World circuit is suitable for frequencies up to 1 MHz. The setting applies...
This circuit was obtained from Maxim documentation. The circuit has 4.5 and 5.5V thresholds for...
This amplifier circuit for instrumentation was found in the manual of the used integrated circuit...