The timing steps of this circuit are indicated by a 7-segment display. The circuit was found in documentation from the 90s. The capacitor next to the 555 determines the timing steges.
This optically coupled circuit was found in the February 1968 Radio Electronics magazine. The...
This circuit uses a special 1950's RCA strobe tube. It can be built with equivalent components for the rest...
This circuit, already explored on this site, can be applied to other comparators in the same...