I would like to connect this 3 wire blower motor to A Arduino but, I don't know which wire is which. No datasheet can be found. Assuming it works how would I go about powering the motor up. I tried to connect the black to ground, red to positive, and blue to arduino pin with no success. Below is the only Info I have: see pic
Philips Dreamstation fan blower motor Snail Turbine
Model 1116486
12VDC
3 wire= green/blue/red
Do you have a DMM? (Digital MultiMeter)
Have you measured the resistance between each of the three wires.
From the CPAP manual.
DC Power Consumption: 12 VDC, 6.67 A
Being a CPAP blower, it may be a 3 phase 12V motor, for quietness, which will need a specific type of circuit to drive it.
DreamStation_CPAP_User_Manual.pdf (3.0 MB)
Tom... 
You need to generate a 3 phase signal and drive each of the wires. I suggest you get another Arduino, connecting one of those wires to the Arduino possibly made a crispy critter of it. This might help in the future.
Gil's Crispy Critter Rules, they apply to processor hardware:
Rule #1. A Power Supply the Arduino is NOT!
Rule #2. Never Connect Anything Inductive (motor, speaker) to an Arduino!
Rule #3 Don't connecting or disconnecting wires with power on.
Rule #4 Do not apply power to any pin unless you know what you are doing.
Rule #5 Do not exceed maximum Voltages.
Rule #6 Many will not power a transmitter.
Rule #7 Take a break and check the wiring before powering the project.
LaryD's Corollary's
Coro #1 when first starting out, add a 220R resistor in series with both Input and Output pins.
Coro #2 buy a DMM (Digital Multi-meter) to measure voltages, currents and resistance.
Violating these rules tends to make crispy critters out of Arduinos.
Hint: It is best to keep the wires under 25cm/10" for good performance.
Thanks, for the info Tom. I'm sure I fried the motor if it even worked to begin with. But, I've learned for next time.
I would of mentioned I used a separate 12V power source but, I figured that was obvious seeing how Arduino is 5V. I guess not to everybody. There are to many negative people in the world
It would seem you like to critique the obvious. My Arduino if fine. For future post you should concentrate your suggestions to help the poster rather then falsely accusing 50 year old's of obvious precautions. Maybe you were assuming I was A child.
Thanks for finally recommending suggestions. Now, for the record I have testing the motor and found it dead from the beginning, using my Multi-meter.
What indicates that? You stated you connected the motor directly to arduino pin. They are not rated for motor current or 12 volts. The Arduino is ok but I had no way of knowing that, putting 12V on the arduino port pins normally destroys them. Sometimes we get lucky.
What did I accuse you of? There was nothing in your post that indicated you had any background in electronics or micro controllers. What obvious precautions does your post indicate you followed?
Your age indicates what? If age counts I was out of college before you were even a gleam in your mother's eye. If age counts my kids are older then you. What obvious precautions did you post that I missed?
FYI There is a nice data sheet for that motor on line.
Good night and good luck.
I to bought one of these to play with, I thought it was a regular pc fan type motor, but quickly found it only jumps for a second when voltage is applied. I'm guessing I've smoked this mine. I do want to try another one and i'm 110% new to Arduino. I did find a controller on the jungle site I think will make it run but i'm not for sure, heres a link if anyone knows if this will make the blower run? Amazon.com: 360W 30A DC 12V 3-Phase Brushless Motor Speed Control PWM Controller Driver : Video Games
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