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rparigoris
Joined: 24 Nov 2009
Posts: 804
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 Posted: Tue Aug 21, 2012 4:19 pm Post subject: Low Voltage Disconnect needed |
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Hi Group
I am need of Low Voltage Cutoff.
Requirements are:
** Ability to handle 10 amps
** When there is a 750mA load, cutoff should occur ~ 11.9 and 12.1 volts
** Minimal parts count, ease of fabrication and low cost
** Somehow once Low Voltage Cutoff threshold is reached, only the secret reed switch (or switches) can reset or bypass things so the battery charger (needs voltage to recognize a battery is hooked up ) can charge, idea is there will be a rare earth magnet in the 12 volt male cigarette lighter plug (attached to the charger) and reed switch/s on the outside of the female receptacle on the battery pack)
** Unless the design allows for very reliable use of Mosfet that isn't going to fail if you look at them the wrong way and even whisper "static electricity", a relay is fine
Thx.
Ron Parigoris [quote][b]
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nuckolls.bob(at)aeroelect
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| Posted: Tue Aug 21, 2012 9:24 pm Post subject: Low Voltage Disconnect needed |
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At 07:17 PM 8/21/2012, you wrote:
| Quote: | Hi Group
I am need of Low Voltage Cutoff.
Requirements are:
** Ability to handle 10 amps
** When there is a 750mA load, cutoff should occur ~ 11.9 and 12.1 volts
** Minimal parts count, ease of fabrication and low cost
** Somehow once Low Voltage Cutoff threshold is reached, only the
secret reed switch (or switches) can reset or bypass things so the
battery charger (needs voltage to recognize a battery is hooked up )
can charge, idea is there will be a rare earth magnet in the 12 volt
male cigarette lighter plug (attached to the charger) and reed
switch/s on the outside of the female receptacle on the battery pack)
** Unless the design allows for very reliable use
of Mosfet that isn't going to fail if you look at them the wrong way
and even whisper "static electricity", a relay is fine
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Here's both all solid state and a relay version
of what I think you asked for. I'd go with the
MosFet version. FETs are quite rugged these days.
http://tinyurl.com/9lc72qs
Bob . . .
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rparigoris
Joined: 24 Nov 2009
Posts: 804
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| Posted: Thu Aug 23, 2012 7:56 am Post subject: Low Voltage Disconnect needed |
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Hi Bob
Thx. for the info.
Ron P.
> Here's both all solid state and a relay version > of what I think you asked for. I'd go with the > MosFet version. FETs are quite rugged these days. > > http://tinyurl.com/9lc72qs [quote][b]
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