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 Connecting 12v batteries in series AND parallel		  New Topic  Reply to Topic
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mattmc97
Apprentece

5 Posts
Posted - Nov 14 2008 :  1:42:29 PM  Show Profile  Reply with Quote
My bro-in-law got an air horn that has a 24VDC solenoid for the actuation. His diesel truck has TWO 12V batteries but they are connected in parallel for use by the truck for starting, etc. The solenoid requires right at 1 A @ 24VDC.

Would it be possible to connect another small set of wires in series on the batteries to get 24VDC for the solenoid?

I wouldn't think so, but I did not know if you used diodes if that would allow it to work.

If not would you have to use a 12VDC -> 24VDC transformer?

thanks.

mattmc

Aaron Cake
Administrator

Canada
6717 Posts
Posted - Nov 18 2008 :  09:15:33 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
It would be far easier to just use a 12V relay instead of the 24V unit that came with the horns.

There is no such thing as a DC transformer.
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mattmc97
Apprentece

5 Posts
Posted - Dec 05 2008 :  3:00:20 PM  Show Profile  Reply with Quote
The relay in integrated inside the horn and there is no access to it.

Is it possible to connect the 2 batteries in serial AND parallel with two sets of wires?
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Aaron Cake
Administrator

Canada
6717 Posts
Posted - Dec 08 2008 :  09:32:12 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
With a whole bunch of diodes it could be done, but it would then make it impossible to charge the batteries.

Try it on 12V though. It may work.
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NAAZIM
New Member

USA
3 Posts
Posted - Dec 17 2008 :  11:23:01 PM  Show Profile  Reply with Quote
IF THAT DOES NOT WORK I HAVE ANOTHER IDEA....DID IT WORK?
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