Homemade 5V PWM Controller with 12V DC Sanyo Denki San Ace @ 0-6000 RPMs

[noelkorea111]

can you post the diagram and parts you used?

pls

[fourbarposer]

I'm just building my own pwm fan controller but since I want to run it at inaudible speeds which may result in the fan not reliably starting up, I'm adding another 555 to create a short startup timer during which it will be at full speed. There are actually dedicated fan control IC's which do this and also allow power cut off and restart something like a finger slows it down etc but I don't think I need all that stuff. My goal is to just have a manual slow pwm speed at all times for silence.

[TutorialsByKevin]

Delta fan??

[1SKILLZthatKILLZ1]

his wig must have blown off :)

[ernes211]

how did you do

[DiGiTaLdAzEDM]

"Roger--we have lift-off Houston...!!"

[brutalfizz]

If I recall correctly, yes.

[msi48701gb]

do we get screws with this fan.?

[LXBD]

O___________O

[brutalfizz]

Its a standard 12V Power supply, I am using a 5V pulse width signal to control it on a home made controller.

[buttah4269]

Put your peen through this thing.

[pr0jectSkyneT]

do you know the exact static pressure of this monster?

[LennyRhys]

Dude this is amazing - I followed your thread in which you put together the PWM circuit, and it's great to see it in action!

I'd love one of these fans but I live in the UK, and here they cost equivalent to $100 each (yeah, EACH) which is just ridiculous. Currently trying to source one or two from the US and would love to build a PWM circuit like yours.

Got a 190CFM delta fan, but they suck at undervolting (crap out @ 7v pffff) hence why I want one of these beauties!!!

[pyrolowryder]

The suspense going up to 6000 was intense!!

[turner850]

they need to make these in 400mm size.

[ladragonaperla1988]

looks like a turbine. cool

[Goodapecum]

Please fasten your safety belts ladies and gentleman were about to lift off.

[LauxHawk]

Wow. You should submit that sound to a movie with a space ship in it and maybe they can use it.

[BluerimTech]

Just like a fuel-less jet engine!

[brutalfizz]

Just google that part number and look at the data sheet.

Two fans would probably be overkill. The higher you get CFM wise, the less a second fan will improve anything.

[TurboHertz]

Whats the static pressure?

[computeruler]

I wonder how much 2 of these would drop the temps on my mugen 2 lol

[13ing]

@CyberDruidtheModGod , there is nothing to measure if using digital voltmeter, this is not the ordinary PWM controller, it supplies only the PWM signal while the fan is powered constantly at 12 volt. The real PWM mechanism is in the fan circuit itself built by the manucfacturer, so the only thing can be measure is only the PWM signal using oscilloscope.

[JustinR19]

0_0

[brutalfizz]

SANYO DENKI - 9SG1212P1G01

[brutalfizz]

260 CFM @ 6000 RPMs

[twdair1]

I wonder how much CFM this moves at 6000rpm O.o

[brutalfizz]

It is a 12V fan, but I am actually controlling it with 5v PWM signal on my homemade controller.

[CyberDruidtheModGod]

I've got a few of those bad boys. It might have been handy to have a digital multimeter in view so we can have some idea of what voltage you are using.