Re: [CAD_CAM_EDM_DRO] electrical help please???

In a message dated 8/4/00 8:15:26 AM Central Daylight Time, SMCDONAL@...
writes:

<< I tried this idea with relays but it didn't work out because the relay
would turn on at one voltage and turn off at a different voltage.

Does anyone here have a good way to make such a device? >>

Stan: You could do this most-accurately and with "ideal" repetition using a
LM-339 "Quad-Comparator" IC (About 39¢, if you "shop") and a
carefully-designed resistor-network. Oh, and the proper output-circuit to
enable that to control your high-voltage. That said, I leave it to someone
more ambitious than I to offer you an actual schematic.