fan control request

Testing and development of Megasquirt 3

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fan control request

Postby ashford » Sun Sep 03, 2017 6:29 am

i would like to see if we could get pwm fan support. granted this can be done easily with a generic pwm output but that leaves no method to turn on the fan with ac.
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Re: fan control request

Postby theturbodog » Tue Dec 26, 2017 11:02 am

I'd like this feature as well, but perhaps in a slightly more generic way that would allow turning on/table/off any of the generic PWM outputs based on another input/function.
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Re: fan control request

Postby goodysgotacuda » Tue Dec 26, 2017 5:30 pm

x3, this is keeping me from running a pwm'd fan.
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Re: fan control request

Postby filipesbp » Mon Jan 01, 2018 5:25 am

This can be done easily with a arduino, what makes dificult to me is how do you control a hi power fan.. Using a relay with pwm it will kill it in no time, right?
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Re: fan control request

Postby goodysgotacuda » Mon Jan 01, 2018 7:36 am

filipesbp wrote:This can be done easily with a arduino, what makes dificult to me is how do you control a hi power fan.. Using a relay with pwm it will kill it in no time, right?



High current solid state relays exist and will take PWM, Ford FPDM modules, OEM fan controllers, etc. I have controlled a fan via PWM using an Arduino and a Ford FPDM before.

I imagine this should be easy to integrate into the MS3 since it already has all of the necessary inputs and outputs. It will do generic PWM, Fuel Pump PWM, Alternator control, etc. Having this feature integrate with the A/C and ECT would be very handy!!!
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I'm new to Megasquirt!
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Re: fan control request

Postby theturbodog » Sun Jan 07, 2018 10:10 am

filipesbp wrote:This can be done easily with a arduino, what makes dificult to me is how do you control a hi power fan.. Using a relay with pwm it will kill it in no time, right?


I'm using a module built for PWM fan control out of a Chrysler Minivan (Dorman 902-310 is the partnumber I used). The module was about $25 with a connector pigtail.
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