This circuit was found in Siliconix documentation from the 1980s. Equivalent operational amplifiers can be used and the output current is very low.
The combination of diodes determines which of the LEDs will light when one of the switches is...
This circuit was found in an article in Radio Electronics magazine. The issue is from July 1992...
This circuit was obtained in a 1978 English magazine. This adjustable stabilized power source...