Well, I fired up my Jarduino for the first time with everything hooked up. All the new cables, temp sensor for water and heatsink fans, etc. So far it looks like all the LED circuits are working as planned, the temp sensors are working, but I can't get the heatsink fans to run. Hmmm, no idea why. According to the drawing I have for the fan circuit, it says to use PWM pin 45 on the Arduino and pin 48 for the fan enable, but I went through the sketch and I think it's actually PWM pin 44 and 47 for the enable. So I used those but nothing...
Temp is holding steady at 27.5 C. I turned down the temp value so the fan should have come on at 20C. If there's a PWM signal from the arduino, where and what would I measure in the circuit?

Well as the other colours are coming on the heatsink temp has climbed to 34.5C. Gonna turn this off until I can get 'er figured out

Want to help, but I don't have a copy of it.

Sorry, page 17 post 162 of this thread.

Ya, but you have to look into the sketch to make sure it's assign to that pin.

Oh, that, lol, ya I did. I have a feeling it's not a sketch related problem.
The lines I found in the sketch that I think do what I'm wanting are:
const int HoodFansPWM = 44; //PWM Hood Heatsink Fan (code added so frequency = 25kHz)
const int HoodFansTranzPin = 47; //Hood Heatsink Fan on/off

This would leave me believe the arduino pins would be 44 and 47, not 45 and 48 as per the diagram previously referred to.

I have a feeling it's a wiring issue. That's why I was hoping to figure out if I should be able to read certain V's at specific places to be able to troubleshoot the circuit.

Woohoo, got the fans working!

get some potting compound (clear) and fill in the holl around your heat sensor


Steve

Cool, thanks for the suggestion.
I've fired everything up and leaving it go for the day. I tried adjusting the fan on temps and the fans shut off even though the heatsink was warmer than the set temp. Turned the set temp back down and they come on again. They also seem to be going fairly slow.. not sure if there's a setting in the sketch that can speed them up or what?

Hmmm, unplugged the PWM fan wire and the fans ramped up to where I think they should be. Anyone hazard a guess what might be wrong? Where I should start looking?