| Power-down low-voltage/timer for Dan G. [message #112044] |
Sat, 15 January 2011 08:36  |
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RF_Burns
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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Dan,
I read on your blog you were thinking of a power-down low-voltage/timer to prevent dead batteries on your car.
I designed and sell these to my two-way radio customers to prevent dead batteries when the radio is left on.
Depending on the ambient temperature it cuts off at 11.5V or higher in the winter or 4 hrs of engine off. Is that what you are looking for? It has a microcontroller so I can program it to do whatever is needed.
I believe the relay is 30Amp.
I also put one on the house battery that is voltage only and rated at 100amp to save the house batteries from deep discharge damage.
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
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| Re: Power-down low-voltage/timer for Dan G. [message #112050 is a reply to message #112044] |
Sat, 15 January 2011 10:18  |
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RF_Burns
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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Senior Member |
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I forgot I had posted a pic on the photosite.
http://www.gmcmhphotos.com/photos/showphoto.php?photo=28712&title=12-volt-accessory-power-down-timer&cat=2
Its a simple hookup.
-Cut the power wire on the device to be shut down
-Crimp an insulated female spade on both ends of the cut wire.
-Fasten the Ground wire from the Timer Module to a convenient ground
-Plug the wire from the power source into the Common relay contact
-Plug the wire from the Device into the N/O (normally Open) contact
By plugging the Device wire into the N/C relay contact, you bypass the timer (N/C is permanent connected to power through the circuit board)
Its 1.5 x 2.0 x 1.25 inches high.
OH.. the Orange wire in the photo is for Ignition sense for use on radios in our Trunking Radio system. We correctly power down the radio through the Ign Sense first so it can deregister from the system. Then we kill the main power to it. We found the radio's standby (OFF) power consumption was about 200ma and the radio would power up again as the battery voltage dropped. Obviously the Engineers never hooked one into a real vehicle.
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
[Updated on: Sat, 15 January 2011 10:28] Report message to a moderator |
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| Re: Power-down low-voltage/timer for Dan G. [message #112076 is a reply to message #112050] |
Sat, 15 January 2011 17:58 |
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WD0AFQ
Messages: 7111
Registered: November 2004
Location: Dexter, Mo.
Karma: 207
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Senior Member |
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Yes Bruce, that might do it. The little Walmart ones do not work and have left me with a dead battery several times, when I forget to turn my tracking radio off.
Got me a new 30 amp battery charger today up in Lake Havasu City.
Dan
3 In Stainless Exhaust Headers
One Ton All Discs/Reaction Arm
355 FD/Quad Bag/Alum Radiator Manny Tran/New eng.
Holley EFI/10 Tire Air Monitoring System
Solarized Coach/Upgraded Windows
Satelite TV/On Demand Hot Water/3Way Refer
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