Remote Wire Question

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May 6, 2009 | 09:03 PM

#11

Njord

500 Watt CAFz'r

Joined: Oct 2007

Posts: 519

Quote:

Originally Posted by kevmurray

This includes relays intended to reduce the load on your head unit.

This is why I suggested a transistor. Smaller, way less current draw to turn on. (~100uA or less) and very cheap.

May 7, 2009 | 12:10 AM

#12

Hof

Thread Starter

50 Watt CAFz'r

iTrader: (2)

Joined: Apr 2005

Posts: 347

Awesome. Thanks for all the responses guys.

May 7, 2009 | 06:02 AM

#13

DeadlySones

2000 Watt CAFz'r

iTrader: (4)

Joined: Mar 2009

Posts: 3,751

Quote:

Originally Posted by Njord

As hooking a fan, or any device alike; I strongly recommend NOT using the remote turn on as a power supply. You're lucky if it doesn't damage the deck. The remote turn on was not designed with that in mind.
Typical(12v) fan will use 250mA-1A. The remote turn-on does not have a large current output. By large, probably not more then 500mA.

As for why your deck can handle 2 fans; You got lucky. Obviously current limiting circuity was used, or they designed it with higher current output.
I would recommend contacting the manufacture and ask how much current can be supplied by that connection before testing your luck like that.

There is never a need to use the remote as a supply. You should be using a transistor (to keep things simple) for your fans.
A 2n2222 can putout just under 1A, and takes no more then connecting the remote to the base, battery to the collector, fan (V+) to the emitter.
They're about 50cents each.

Thanks for the info. I looked them up. Pretty easy.... The fans I use are made for PC cases. Very low current draw. only 93mA's each. I stopped using the remote turn on awhile ago for them. It was a quick way until I ran the extra wire to turn them on. I've since added lighting and everything is controlled by a switch.