This physical line servo control uses components that are not currently common. The circuit is from an 80's documentation and is powered by a voltage according to the servo.
This General Electric circuit was found in a 1964 documentation. The circuit triggers a relay when...
This circuit is used to cut the “click” in the loudspeaker of amplifiers when they are turned on....
Pressing S1 the LED glows by a time interval depending on the capacitor. Time intervals in the...