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Guides on DIY fan controller with controller knobs - Page 2

post #11 of 13
Sorry for the delayed response. A PIC is a microcontroller made by MicroChip. www.microchip.com
It's a bit of a steep learning curve if you're not familiar with programming and MCUs.

Here's another site that has some good info on fan control methods.
http://www.procooling.com/articles/h...ontrol_met.php
This method looks the best: Variable Duty Cycle/PWM Speed Control
He said it was expensive though....

Cost Analysis: (http://www.digikey.com and http://www.radioshack.com)
Part | Desc | DigiKey # (-ND) | Price (USD)

Resistors
Closest values and using the 8V reference modification:
R6 3.9K 1/4W resistors 3.9KQBK-ND $0.056 Min Quantity:5
R4 5.1K 1/4W resistors 5.1KQBK-ND $0.056 Min Quantity:5
R7 8.2K 1/4W resistors 8.2KQBK-ND $0.056 Min Quantity:5
R1,R2,R5 56K 1/4W resistors 56KQBK-ND $0.056 Min Quantity:5

Capacitor
For his 80Hz planned upgrade:
C1 0.1uF 50V ceramic 399-2054-ND $0.21
Original:
C1 0.47uF 50V ceramic 399-2100-ND $0.83

Potentiometer or Variable Resistor (He calls it a rheostat)
R3 5K 1/8W 12mm Horiz CT2253-ND $1.51

NPN transistor
Q1 P2N2222A 40V 600mA P2N2222AOS-ND $0.36

FET (Field Effect Transistor)
M1 IRF510 100V 5.6A IRF510-ND $1.08

Diode
D1 Not sure what he used... $1 ?

ICs
U1 NE555P timer 296-1411-5-ND $0.45
U2 UA741CP OP-Amp 296-11107-5-ND $0.40


From RadioShack:
PC Board $2-4
Additional expenses:
Soldering Iron kit $8
Wire 3 spools colored 22AWG $5.49

So the parts to control 1 fan comes to $9.13+s/h

Each additional fan would need: U2, Q1, M1, D1, R3-7 (I'm assuming the 555 timer would be able to drive multiple OP-Amps, which it should since they barely draw any current)
You'd already have 2 extra R5 and 4 extra R4,6, and 7.
So no cost there until you get to 3 additional fans.
U2+Q1+M1+D1=$2.84

Parts for 4 fan controller: $17.71+s/h

You would still need to figure out how to mount it and probably cut up a 5.25 bay cover to use as a front plate. If you want fancy knobs you'd need to find those as well.

I'll probably build one of these for my next rig which'll be water cooled and replace the potentiometers with thermistors to make it temp-controlled.

Well, gotta go. I'll try to figure out what diode needs to be used for D1.
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My System
(22 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K ASUS P8Z68-V PRO/GEN3 GTX 470 G.Skill F3-12800CL8-4GBXM 
Hard DriveHard DriveHard DriveHard Drive
OCZ Vertex 2 60GB SSD WD740GD Raptor WD6400AAKS Seagate ST31500341AS 
Optical DriveCoolingCoolingCooling
Asus DRW-24B1ST Swiftech APOGEE GT Danger Den DD-470GTX Swiftech MCR220 Radiator 
OSMonitorMonitorKeyboard
Windows 7 Ultimate x64 Dell 2408WFP Vizio xvt473sv Razer Lycosa 
PowerCaseMouseAudio
Corsair 620HX CM Stacker 810 Razer Lachesis Logitech Z-5500 5.1 speakers 
Other
CyberPower CP1500AVRLCD 
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post #12 of 13
Thread Starter 
Wow Thank you....that really helps me out a lot!...thanks again...reps+
post #13 of 13
Ok, I think this will work for D1:
D1 400V 1A Rectifier 1N4004DICT-ND $0.26

That reduces the cost slightly.

If you decide to build one, I would order some extra parts just in case you burn up any chips or transistors.
Oh and some 8 DIP IC sockets would be a good idea.... That way you can easily change out the ICs if something goes wrong.
8 pin IC socket ED3108-ND $0.32

Adds a little to the cost but will save a lot of headache. It's a major pain to remove a soldered IC.

$9.03 for 1 fan control
$2.42 for each additional fan ($2.48 if 4th/5th for extra R5, $2.65 if 6th/above for extra R4-7)
$16.35 for 4 fan control
My System
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CPUMotherboardGraphicsRAM
i7-2600K ASUS P8Z68-V PRO/GEN3 GTX 470 G.Skill F3-12800CL8-4GBXM 
Hard DriveHard DriveHard DriveHard Drive
OCZ Vertex 2 60GB SSD WD740GD Raptor WD6400AAKS Seagate ST31500341AS 
Optical DriveCoolingCoolingCooling
Asus DRW-24B1ST Swiftech APOGEE GT Danger Den DD-470GTX Swiftech MCR220 Radiator 
OSMonitorMonitorKeyboard
Windows 7 Ultimate x64 Dell 2408WFP Vizio xvt473sv Razer Lycosa 
PowerCaseMouseAudio
Corsair 620HX CM Stacker 810 Razer Lachesis Logitech Z-5500 5.1 speakers 
Other
CyberPower CP1500AVRLCD 
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My System
(22 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600K ASUS P8Z68-V PRO/GEN3 GTX 470 G.Skill F3-12800CL8-4GBXM 
Hard DriveHard DriveHard DriveHard Drive
OCZ Vertex 2 60GB SSD WD740GD Raptor WD6400AAKS Seagate ST31500341AS 
Optical DriveCoolingCoolingCooling
Asus DRW-24B1ST Swiftech APOGEE GT Danger Den DD-470GTX Swiftech MCR220 Radiator 
OSMonitorMonitorKeyboard
Windows 7 Ultimate x64 Dell 2408WFP Vizio xvt473sv Razer Lycosa 
PowerCaseMouseAudio
Corsair 620HX CM Stacker 810 Razer Lachesis Logitech Z-5500 5.1 speakers 
Other
CyberPower CP1500AVRLCD 
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