Rob S
Well-Known Member
- Joined
- 4/1/12
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I got some components together to make a magnetic stirrer and it's all looking good except for speed control for the PC fan.
The fan is off a PC and runs fast.
The power supply has 12V 1000mA output.
The LED dimmer is one off eBay that I've seen someone else use on this site or another one??
![IMAG0163.jpg IMAG0163.jpg](https://cdn.imagearchive.com/aussiehomebrewer/data/attachments/43/43707-60456a45203b97518b5d752fc3eb755e.jpg)
The problem is that the dimmer doesn't work. The fan is the same speed no matter the position of the LED dimmer.
It's a 4-wire fan and I found the two wires that make the fan go when connected straight to the power and cut the other two off. Hopefully I wasn't supposed to use one of these wires....I can't seem to get google much useful information about these fans wrt LED dimmer as speed controller.
I also have two different 3-wire fans (with the spare wire cut off) but from google the third wire is a tacho used by the computer as a check and balance to ensure that the fan is working to speed.
Any help would be a sensational as I want to put down my next beer in a couple of days.
Cheers,
Rob
The fan is off a PC and runs fast.
The power supply has 12V 1000mA output.
The LED dimmer is one off eBay that I've seen someone else use on this site or another one??
![IMAG0163.jpg IMAG0163.jpg](https://cdn.imagearchive.com/aussiehomebrewer/data/attachments/43/43707-60456a45203b97518b5d752fc3eb755e.jpg)
The problem is that the dimmer doesn't work. The fan is the same speed no matter the position of the LED dimmer.
It's a 4-wire fan and I found the two wires that make the fan go when connected straight to the power and cut the other two off. Hopefully I wasn't supposed to use one of these wires....I can't seem to get google much useful information about these fans wrt LED dimmer as speed controller.
I also have two different 3-wire fans (with the spare wire cut off) but from google the third wire is a tacho used by the computer as a check and balance to ensure that the fan is working to speed.
Any help would be a sensational as I want to put down my next beer in a couple of days.
Cheers,
Rob