I'm also in the mood to install a fan. My empeg gets really hot in my Jeep and I don't have A/C (hey - it's a jeep!).

So, watching the temp with hiJack - I decided a fan would be nice.

The question: The header on the mainboard doesn't seem to put out any voltage. What gives?? Did all you guys just tap onto the 12VDC someplace else??

Let me know and thanks,

-Ben

Both pins are 12V I believe. You'll need to use the case as ground.

- Trevor

How Bizarre...

I'll check that out... can anyone else verify?

Thanks,

-Ben

Yep. Look here for a previous thread on it.

- Trevor

I've got the same problem... well almost. I do have A/C, but it's not as useful as most A/C units when the top and doors are in the garage. I always have over-heating issues w/ my 2 drive unit when the temp is over about 90 degrees outside.

Be shure to read this

I did... I didn't like the design.. not that's it's bad - but I would prefer a design that turns the fan off/on. It's not good to undervoltage some of those fans out there.. they can do kooky things... so I'm going to do something a little different..

Hey - does anyone know if there's an SPI interface inside the Empeg? I did read the onboard temp sensor is a DS1821 (or 1820) which are 1-wire devices.. mine works.. and I was thinking of using either a DS1721 or a 1-wire thermostat, if they have on... any prefs for anyone?? I suppose if one exists and is useful, I'll make the design for that in case anyone wants to write a hack to control the fan. I figure they could wire it to the adjustable temp-warning alarm which would reset the thermostat as well. When the alarm goes off at the new setting, so does the fan..

Comments, anyone?

-Ben

Ok, looking back... there is no 1wire thermostat - really.. in order to go standalone, I'd have to use one of the other offerings, like the 1721 or the 1621 or the 1620... would any of the kernel hackers out there have a pref??

SMBus (I2C), or SPI (3wire)???

-Ben