Fan controler via thermal..

[jleaman]

Does any one know of a good site that has schematics for thermal controlers im looking for one for my fan. im looking for one that will contole the voltage for the van the hotter the heatsink is i want the fan to spin more and the cooler the less fan spinning.. i know they xist because i robed one out of a computer powersuppy but i want one that i can copy and create more of..

thanks

J'

 

[timc]

Maybe not exactly what you asked for, but I use the following
one on computers fans to quieten them down.

R7 will run the fan at a low speed until the set temp is reached
and the fan is run at almost full speed.

You can also try http://sound.westhost.com/project42.htm

Regards,
Tim.

 

[jleaman]

im looking for some thing that will put more power to the fan for when the heat sinks get hotter.. i have a set up now but i want to make 2 of the exact same things..

J'

 

[cowanrg]

well, these are always great:

http://www.newegg.com/app/ViewProduct.asp?submit=manufactory&catalog=127&manufactory=1400&DEPA=1

they are thermo controlled fans. they are cheap too. $6 for a VERY nice fan. (ive used em before, they are quiet, and very good efficiency). the box has a rating of how fast they spin for how hot. you can always just insulate the sensor if you want it to go slower at higher temps. it just depends on where you put the temp probe.

that is actually a great idea. those fans are nearly silent, and big enough to cool a good-sized heatsink adequately. and for the price, cant go wrong. btw, the store (newegg.com), is VERY reliable. one of the best ive dealt with online. fast shipping and great prices.

 

[jleaman]

6 bucks us hehe that is cheap hehe

 

[wuffwaff]

Hi Jason,

try the MIC502 chip. It controls the fan with a PWM signal so it can go real slow. You can set start temperatures etc.

I´ve even got a pcb designed for it.

william

 

[tiroth]

PWM may not be something you want in a piece of analog circuitry...

 

[fmak]

Does any one know of a good site that has schematics for thermal controlers im looking for one for my fan. im looking for one that will contole the voltage for the van the hotter the heatsink is i want the fan to spin more and the cooler the less fan spinning.. i know they xist because i robed one out of a computer powersuppy but i want one that i can copy and create more of..

thanks

J'

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Its probably cheaper to buy one from Farnell.com for Papst fans.

 

[Electro]

Go to ePanorama.net

Then find sleeve DC motor fans. Ball bearings fans seems to vibrate and make more noise than sleeve. Zalman fans move a lot of air with minimal noise.

Have fun!