never let yourself get this board

fancontrol · Post by **fancontrol** » Wed Mar 17, 2004 5:52 pm

I needed something to do this afternoon other than push paper. So in my best effort to waste time I built a thermostat without a board. An image of the resulting rat's nest:

The thing with the heat sink switches the fan (white connector), the comparitor (IC in the blue socket) compares temperature to the threshold, the green wires go to the NTC thermistor, the bundle of resistors (I think there are 5) do the rest. Black and red wires go to the mobo fan header. I'll add a tach wire if I feel extra dumb.

Fan turns on at 35C, off at 28. Works like a champ. Uglier than sin.

Oh, and the black and red probes are watching to make sure it's working right--they are temporary.

Good times. The next step is to encapsulate the whole thing in epoxy. Don't try this at home (because it's dumb).

Copper · Post by **Copper** » Wed Mar 17, 2004 6:33 pm

Only $9.95 + shipping. Get yours while supplies last.

(As "stupid" as it is I can only wish I had the electronics knowledge to actuallly put the "ugly" thing together)

fancontrol · Post by **fancontrol** » Mon Mar 22, 2004 6:40 am

Glorious epoxy work is done. Now it looks like my exhaust fan is plugged into a chunky wad of snot. Maybe I should have buried a blue LED in there...

Post by **Ralf Hutter** » Mon Mar 22, 2004 6:46 am

fancontrol wrote:Glorious epoxy work is done. Now it looks like my exhaust fan is plugged into a chunky wad of snot. Maybe I should have buried a blue LED in there...

Pics please. We want to see this in all it's gloriousness!

fancontrol · Post by **fancontrol** » Tue Mar 23, 2004 6:59 am

money shot, so to speak:

Post by **Ralf Hutter** » Tue Mar 23, 2004 7:11 am

Ooh, that's nice! How can I order some?

Ooops, I'd better wait until I have a case with a window so I can show them off. I'll get back to you....

Post by **Rusty075** » Tue Mar 23, 2004 7:14 am

Wow, that's um, um, aaahhhh... stunning(?)

Looks strangely similar to something you'd see hanging out of a toddler's nose.

Beautiful work fancontrol, just beautiful.

fancontrol · Post by **fancontrol** » Tue Mar 23, 2004 4:03 pm

Ralf Hutter wrote:Ooh, that's nice! How can I order some?

I'll call it the ThermoBooger(c).

al bundy · Post by **al bundy** » Tue Mar 23, 2004 9:52 pm

Rusty075 wrote:...Looks strangely similar to something you'd see hanging out of a toddler's nose...

r2fugu · Post by **r2fugu** » Wed Mar 24, 2004 6:59 am

O.M.G.

sbabb · Post by **sbabb** » Wed Mar 24, 2004 9:03 am

Guess it really was a "blowout sale."

I think you may have invented robot snot, fancontrol. If this came shooting out of a human's nose, I'd be worried, but I could imagine a robot doing the "one-finger-snot-rocket" and finding that on the ground.

fancontrol · Post by **fancontrol** » Thu Mar 25, 2004 7:33 am

I'd be flattered if Keanu Reeves would be willing to have this sucked out of his navel.

The latest development: I added diodes so it would run of +12 when the PC is on, +5sb when it's off. That way the fan keeps sucking out hot air (quietly) until the computer is cool even after it's turned off. I like that.

The down side is you have to splice into the main board power cable; +5sb is not available on any of the other PS connectors. More ugliness.

jpsa · Post by **jpsa** » Tue Apr 27, 2004 8:14 am

you REALLY should have stuck a blue led in there!