Problem building DIY stirplate (CPU fan and cell phone chargers)

I have hooked up a CPU fan to a few cell phone chargers and it looks like the fan wants to work, but all it does is pulse a little bit and not actually turn. I've tried several different chargers and have gotten the same result with each. And yes, I have hooked positive (red) wires to positive (red) wires, and negative (black) wires to negative (black) wires. There is a third white wire on my fan, but I believe that is just a speed control and doesn't really affect power going to the fan. Any thoughts? Is the fan just no good?

What is the voltage on the cell charger? I had a similar problem and that is what the issue was. I ended up getting a adujastable one from Radio Shack. That was driven by the fact I could not dial my setup in enough to work on my 2000ml flask. Would work on my buddies 1000ml though. Once I got the adjustable one I could get the right combo with the adapter and dial thing.

Also is it doing it with the magnet already on there or is it just the fan?

About to make your life alot easier...made my stirplate with it and it works great.

Thermaltake Mobilefan II External USB Cooling Fan P/N: A1888

Drake9: I've tried 4.5, 5, and 6v chargers. Its a 12v fan. JBOGAN: I am checking that out for sure. Found one for $14 with no shipping.

JBOGAN said:

About to make your life alot easier...made my stirplate with it and it works great.

Thermaltake Mobilefan II External USB Cooling Fan P/N: A1888

Click to expand...

I've made two with those and they work great. Paired with this plug, I have on/off control of both stirplates. Works awesome!

http://youtu.be/-bZKx5ueo88

here is the one i made with some spare wood around the house and some paint for my logo.

mtnagel said:

I've made two with those and they work great. Paired with this plug, I have on/off control of both stirplates. Works awesome!

Click to expand...

Awesome find there!Looks like i have some shopping to do.

JBOGAN said:

http://youtu.be/-bZKx5ueo88

here is the one i made with some spare wood around the house and some paint for my logo.

Click to expand...

Jeez that thing is cruising! That is exactly the way I want mine to work. How big is that flask?

JBOGAN said:

About to make your life alot easier...made my stirplate with it and it works great.

Thermaltake Mobilefan II External USB Cooling Fan P/N: A1888

Click to expand...

I just googled that. It brought me to amazon. In the "frequently bought together" section: erlenmeyer flasks and stir bars.

Ha! I saw that too.

it is a 1000ml but does the same on my 2000ml.

1000ml but does the same job on my 2000ml.