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Subject: Re: Overvoltage Schematic Wanted
NNTP-Posting-Date: Sat, 14 Sep 2002 00:54:31 EDT
Organization: Prodigy Internet http://www.prodigy.com
Date: Sat, 14 Sep 2002 04:54:31 GMT
> I'm looking for an overvoltage schematic that meets the following
> criteria. If anyone
> has one I would appreciate a copy and be willing to pay any expense if
> My email is email@example.com
> 1. For a 12 volt circuit that would trip at about 16 volts
> 2. Does not use any relays
> 3. Has three wires to device, one + in, one ground, and one + out.
> 4. If the + in exceeds the set voltage then there is no output.
> 5. Input must be cut off and back on to reset
> Such a device is used on aircraft to cut off voltage to the alternator
> should it
> fail and normal voltage exceeded. I've seen the clam shell type and the
> type but never a schematic for the type I've mentioned above. ANY help
> will be greatly appreciated. Thanks.
A quick Google search on "scr crowbar schematic" turned this up as one of the
first hits, and it seems to address precisely your issue:
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