Remote Wire Question
05-06-2009, 08:37 PM
#5
05-06-2009, 08:43 PM
#7
500 Watt CAFz'r
Join Date: Oct 2007
Posts: 519
You should be able to hook up as many amps as you want. All amps (unless the engineers are morons) will have a high input impedance (for the remote turn-on).
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.
datasheet:
http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXyzzyw.pdf
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.
datasheet:
http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXyzzyw.pdf
05-06-2009, 08:51 PM
#9
500 Watt CAFz'r
Join Date: Jan 2008
Posts: 537
Active devices like amps and line drivers sink less than a few milliamps of current from your remote output. Check the current draw of anything you connect to it to make sure the sum does not exceed the max. This includes relays intended to reduce the load on your head unit.
Last edited by kevmurray; 05-06-2009 at 08:56 PM. Reason: drunk, again... sigh
