Sandman101 Posted June 28, 2004 Report Share Posted June 28, 2004 Hey all,It's been a long time since I've done discrete electronics and I'm in need of a discrete solution (with logic gates):I have a switch, that once opened, a circuit is "turned on" and runs. If the switch closes, it cannot affect the system. Sorta like an alarm .. when you break in, the alarm shouldn't shut off once the door has been closed !Any help is appreciated!Thanks! Quote Link to comment Share on other sites More sharing options...
MP Posted June 29, 2004 Report Share Posted June 29, 2004 Probably looking for a RS Latch. Once set, you have to pulse the reset line to change state. There are chips available, or you can build one with gates.Hope it is helpful.MP Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted July 1, 2004 Report Share Posted July 1, 2004 How about an SCR? Quote Link to comment Share on other sites More sharing options...
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