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 is from a 90s documentation. It has a hysteresis and uses a light sensing bridge. The...
This oscillator was found in a 70s RCA linear circuit manual. The oscillator makes use of an...
This circuit, which in our times would be called a shield, can also be used with other loads. The...