dr pepper
Advanced Member level 1

I'm a industrial controls electrican.
Years back when I started this kinda work some control panels had 3 neons on one end, which flashed in sequence, I'm not sure if they just indicated the presence of the 3 phases or actually indicated correct sequence.
Does anyone remember these?, the circuitry was probably simple using just R's & C's, I'd like to re create one maybe a low voltage version with leds, probably ott I was thinking of 3 logic counter dividers to flash leds at much reduced frequency, and reset 2 of them when one phase goes through zero.
Years back when I started this kinda work some control panels had 3 neons on one end, which flashed in sequence, I'm not sure if they just indicated the presence of the 3 phases or actually indicated correct sequence.
Does anyone remember these?, the circuitry was probably simple using just R's & C's, I'd like to re create one maybe a low voltage version with leds, probably ott I was thinking of 3 logic counter dividers to flash leds at much reduced frequency, and reset 2 of them when one phase goes through zero.