This circuit, which can serve as a reference for restorations, was found in the October 1989 issue of Radio Electronics magazine. The circuit uses a 5-digit display and a dedicated integrated circuit.
This circuit was obtained from a 1976 NASA handbook. The circuit makes use of an operational of the...
This circuit produces a light effect that "ripples" between maximum and minimum points smoothly, with...
This amplifier for instrumentation with differential input is from the factory manual of the...