This circuit is from an 80's Radio Electronics. The circuit has several output options for 50 mA currents with load indicator through LEDs.
This circuit can reduce the voltage of a source by providing regulated adjustable output. The...
Figure bellow shows how one of the two separated counters found inside the 4518 is used as a...
This circuit for very long-time intervals was found in the March 1993 Radio Electronics magazine. Times...