Homemade PWM Fan Controller with dsPIC30F4011

Something I built over the summer.
Took me about a month. :D

Used dsPIC30F4011 and capable of communicating with a PC via UART.
All the configurations are changable via UART and settings are stored in EEPROM.

It is capable of controlling 5 fans with 8 temperature sensors.
RPM can only be read from 4 fans due to limited number of pins on the microcontroller chip.
The fan can be set to manual speed, or control automatically with 8 different configurable temperature/speed levels.

Output is linear, so there is no noise from PWM.

Pictures at my blog (only in Korean)
http://lambition.tistory.com/117

Category:

Science & Technology

Tags:

• PWM
• FAN
• CONTROLER
• dsPIC
• microcontroller
• pic

[Johnalexgray]

cool. how many watts can it support.

[lambition]

@Johnalexgray

That really depends on which MOSFET is used. I used a small MOSFET without heatsink. So not much. Only about 5W max..

[Johnalexgray]

@lambition Thx for the reply, I'm interested in making one myself because I just fried my old one.

I need a controller that can handle 2 high speed fans. (almost 260 cfm) and that can auto control the speeds depending on the temps. Do you think it would be too hard / expensive to make? I found a video of someone doing just what i want to do on youtube But I need to buy all the parts and not sure what would be more cost effective

[lambition]

@Johnalexgray

It probably is more cost effective to buy one that is already on the market.

Parts probably will cost about $50~60, but you will need to spend quiet some time developing.

Making one requires extensive knowledge in microprocessors, PWM, and some other basic electronic skills.

Also, when dealing with high current, there is change of fire if you don't know what you are doing.

If you know enough it won't be hard at all. The circuit it self is fairly simple.

[theultimatedestroy80]

nice!!!!! can you make a tautorial of how to make it !!!!! please :)

[D081]

neato mosquito

[gezzaky]

nice work

[slax32]

cool!

[stupoop]

badass