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NightHunter · 03-11-2004, 07:30 PM

use a diode, and a couple of relays and walla, you got your self a isolator.
I also put a 1n4001 diode on the positive wire going from the car battery to my backup. make the the stripe on the diode is facing the back up battery. This will keep the car from drawing power from your backup battery. I use this relay setup below also with my inverter and the $6 backup nicd I bought from a guy on this board.
this is what I did, compliments to "the specialist" for all the help, works works awsome..
"Since you only want the battery to charge when the PC is on, since we have no way of shutting off the charging cycle, you need the PC on to draw some juice away from the abttery do it doesn't overcharge.

Yo accomplish this, you basically wire a relay and hook it up to a molex so it connects the backup battery only when the PC is powered on and the 12 volt line on the molex is throwing out 12 volts.

Now this solves issues such as the accesory cuttingout during crank, the molex 12 wont cutoff during crank leaving teh relay connecting hte backup battery and wa la. No reboot. Well if I planned it right, I hope.

Does that make sense? I'm suprised no one ran the relay turn-on from the PC PS 12 volt Molex. I love my great ideas.

Make sure you put a 20amp fuse before everything "

03-11-2004, 07:30 PM	#8
NightHunter Banned Join Date: Dec 2003 Location: Milwaukee, WI Posts: 417	use a diode, and a couple of relays and walla, you got your self a isolator. I also put a 1n4001 diode on the positive wire going from the car battery to my backup. make the the stripe on the diode is facing the back up battery. This will keep the car from drawing power from your backup battery. I use this relay setup below also with my inverter and the $6 backup nicd I bought from a guy on this board. this is what I did, compliments to "the specialist" for all the help, works works awsome.. "Since you only want the battery to charge when the PC is on, since we have no way of shutting off the charging cycle, you need the PC on to draw some juice away from the abttery do it doesn't overcharge. Yo accomplish this, you basically wire a relay and hook it up to a molex so it connects the backup battery only when the PC is powered on and the 12 volt line on the molex is throwing out 12 volts. Now this solves issues such as the accesory cuttingout during crank, the molex 12 wont cutoff during crank leaving teh relay connecting hte backup battery and wa la. No reboot. Well if I planned it right, I hope. Does that make sense? I'm suprised no one ran the relay turn-on from the PC PS 12 volt Molex. I love my great ideas. Make sure you put a 20amp fuse before everything "