inverting the fan output to drive normally close relay help

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fritoss007
Helpful MS/Extra'er
Posts: 77
Joined: Fri Jul 29, 2005 5:54 pm
Location: Sept-Iles, Quebec, Canada

inverting the fan output to drive normally close relay help

Post by fritoss007 »

I need to invert the fan output...to drive my stock, normally close, fan relay

when ON should be not ground

and

when OFF should be ground !!!

thanks alot !
davezed
Helpful MS/Extra'er
Posts: 94
Joined: Mon Nov 01, 2004 1:11 pm
Location: Australia

Post by davezed »

Hi fritoss007
Have you checked out http://megasquirt.sourceforge.net/extra/outputs.htm, this should have all the info you need

Cheers
DaveZZ
fritoss007
Helpful MS/Extra'er
Posts: 77
Joined: Fri Jul 29, 2005 5:54 pm
Location: Sept-Iles, Quebec, Canada

Post by fritoss007 »

hey!

it's looking good....but i wanted to use fan out instead of an output.....

but i think i will have to use an output !!!!



thanks for the advice !!
davezed
Helpful MS/Extra'er
Posts: 94
Joined: Mon Nov 01, 2004 1:11 pm
Location: Australia

Post by davezed »

G'day fritoss007
Not quite sure what you mean but it sounds like you’re enjoying yourself and I guess that’s all that matters......
I have attached an old msq file from when I was running 029q2 (now running MS2), with this I had it rigged so at the first set point it would turn two thermos on in series (low speed), and then when the next set point was reached it would power the fans in parallel (hi speed), this had a softening effect on the instantaneous power surge. Anyway enjoy...


Cheers
DaveZZ
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