Found in 1965s General Electric documentation, this circuit is intended for the control of servos connected to the power grid. Equivalent modern components can be employed.
In the figure we have a circuit that allows us to obtain a variable voltage of approximately 0.5 to 25 V...
This circuit causes an instrument needle to oscillate to signal an event. The circuit is powered by...
This circuit was found in a 1982 documentation. It uses only one integrated circuit and can be...