blade828

Hey guys, Its the first summer my amps have been in my car and today they have started going into protection from over heating. I have got a couple of large PC fans on them but I haven't wired them up yet. I only want them to come on when the amps are on. What would be the easiest way to do this? With a relay? If so, what type of relay.
Thanks

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4LEDboy

G'day thar!

dose your amp have an ignition trigger wire? you could most probably tap into that, or if your HU has a AMP trigger wire you can use that aswell Goodluck!

blade828

My amps are wired up the usual way... 12v and neg from the battery and they are controlled by the amp wire from the m2-atx. I dont think the amp trigger wire would be suitable to run two fans, would it supply enough power? Which is why the only way I can think of is with a relay, using the amp trigger wire to turn on the relay.

4LEDboy

Humm OK, well those fan wont draw alot of power at all, but you could use an SSR (soild state relay) to trigger them from the wire off the power supply , or maybe if you used a temp sensor?

rgarjr

A good ol relay would be your best bet to power up those fans.

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kross

I haven't tried it myself, but it has been said in the power supply forum that the amplifier remote turn-on output on the M2-ATX is very weak, does not supply much current at all, barely enough to turn on the amps. I'm sure two fans would be too much.

A small reed relay would be good.

Also, do PC fans run off of 5V or 12V? I'm too lazy to look it up. But make sure your fans are okay to run on 12V.

-- Kevin

HiJackZX1

You could always buy a Pac TR-4..... Basically you would hook your remote wire to that, connect a 12V source, connect to your amp, and connect to a ground. When your M2-ATX sends a signnal to the Pac TR-4, it activates it sending a 12V signal to the amp turn on wire. Basically this is used for setup that have alot of amps that need a 12V signal in order to turn them all on. I use this with AMP control to power on 5 seperate amps. It will most def work with your situation.

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FPeter

yes, the remote of M1/M2 dies very often - might be the too much power draw. but there is an easy way to protect it: drive the relay throug an optocoupler!




the LED in optocoupler takes mA-s only. for example, a KB817 or SFH617 are ok. a current limiter resistor is required for the LED - 800-250 Ohm depends on the input voltage and opto's specs, should be tested, you should start from the larger value - and a protection diode (1N4001-7) to dissipate the peak voltage coming from relay's coil...

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prodigalsun

As everyone has basically mentioned use a relay trigger set up. Trigger from M2 (marginal power draw to trigger), 12V from car battery (assuming 12v fans) and ground to a good spot. Should be good to go.

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