PWM fan control

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oskar
Helpful MS/Extra'er
Posts: 62
Joined: Sun Aug 19, 2007 3:31 pm
Location: Lyons, CO

PWM fan control

Post by oskar »

the mods I am making on my car ( 1981 Mercedes Gwagen ) include a electric fan instead of the mechanical one.

The new fan - speed - is PWM controlled.
Any idea whether I can do that using MSextra without a big effort, or is it better to program a PIC

For idle I am using the PWM option ...

Thanks
Oskar
UnaClocker
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Post by UnaClocker »

Just run it full tilt when you need it, leave it off when you don't.
Brian
'84 Dodge Rampage
oskar
Helpful MS/Extra'er
Posts: 62
Joined: Sun Aug 19, 2007 3:31 pm
Location: Lyons, CO

Post by oskar »

well, thats not quite what I want. Then I could connect directly to a thermoswitch ...
turboy
MS/Extra Newbie
Posts: 17
Joined: Thu Mar 29, 2007 9:16 am

PWM fan control

Post by turboy »

I believe all the timers are used so you have to make something autonome. I used a atmega8 to pwm the fan (not finished yet).

Simon

the mods I am making on my car ( 1981 Mercedes Gwagen ) include a electric fan instead of the mechanical one.

The new fan - speed - is PWM controlled.
Any idea whether I can do that using MSextra without a big effort, or is it better to program a PIC

For idle I am using the PWM option ...

Thanks
Oskar






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oskar
Helpful MS/Extra'er
Posts: 62
Joined: Sun Aug 19, 2007 3:31 pm
Location: Lyons, CO

Re: PWM fan control

Post by oskar »

I took a look on the uC specs. It has 7 PWM channels and it does not look like all are used. Need to dig a little more tomorrow ...
turboy wrote:I believe all the timers are used so you have to make something autonome. I used a atmega8 to pwm the fan (not finished yet).

Simon
UnaClocker
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Posts: 1933
Joined: Fri May 07, 2004 12:59 pm
Location: Tacoma, WA
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Post by UnaClocker »

Yup, one of them is the Bootloader jumper.. See this thread..
http://www.msextra.com/viewtopic.php?t=25731
Brian
'84 Dodge Rampage
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