DIY T-Balancer style fan controller

[JordanMac]

This is a Picaxe (08m2) based fan controller using a DS18B20 temperature probe in a waterproof casing as the plan is to put it inside my res. The picaxe reads the temp and turns the fans on and off quicker the higher the temp, it’s an analogue version of PWM.

The Code:

main: Readtemp 1, B0 if B0>40 then label_40 if B0>39 then label_39 if B0>38 then label_38 if B0>37 then label_37 if B0>36 then label_36 if B0>35 then label_35 if B0>34 then label_34 if B0>33 then label_33 if B0>32 then label_32 if B0>31 then label_31 if B0>30 then label_30 goto main
label_40: high 0  pause 1000  low 0  pause 1  goto main
label_39: high 0  pause 10  low 0  pause 2  goto main
	label_38: high 0	  pause 10	  low 0	  pause 5	  goto main
	label_37: high 0	  pause 10	  low 0	  pause 10	  goto main
	label_36: high 0	  pause 10	  low 0	  pause 50	  goto main
	label_35: high 0	  pause 10	  low 0	  pause 100	  goto main
	label_34: high 0	  pause 10	  low 0	  pause 250	  goto main
	label_33: high 0	  pause 10	  low 0	  pause 500	  goto main
	label_32: high 0	  pause 10	  low 0	  pause 1000	  goto main
	label_31: high 0	  pause 10	  low 0	  pause 2000	  goto main
	label_30: high 0	  pause 10	  low 0	  pause 5000	  goto main

Design:

The fan splitter has be turned 90 degrees to allow more room for the Molex plugs.

The parts

[JordanMac]

Yeah, my soldering is friggin awful I know but it works. The values for the temp need altering to make sure the fans turn on at the right points.

[Theo]

Loooks goooood! does it really work though? If it does then well done!

[JordanMac]

Loooks goooood! does it really work though? If it does then well done!

yeah it works the temps need to be changed and reprogrammed to fine tune it but yeah its fully functional

[TicTac]

i have used the pic axe and i would love to see more on this XD

[Guest]

What'd you use for the fan connector itself?

[JordanMac]

What'd you use for the fan connector itself?

its the fan connector that comes with the nzxt switch 810

[RobertVanGilder]

This is great! I'm going to start making this myself (If you don't mind me copying)...BTW, where did you buy the two microchips from?

[JordanMac]

This is great! I'm going to start making this myself (If you don't mind me copying)...BTW, where did you buy the two microchips from?

theres only one microchip, the other is a relay and i got them from my college