This circuit is from an 80's Radio Electronics. The circuit has several output options for 50 mA currents with load indicator through LEDs.
The Buck-type DC-DC converter (voltage lowerer) shown in figure 11 is suggested by Analog Devices...
This circuit, which appears in other versions on this website, was obtained in old documentation. The load...
This circuit is from an Electronic Design from the 90's. The main integrated circuit is uncommon...