Need to power case cooling fans with 120v outlet

[TheloniousMink]

I need a schematic for a small electrical project. I want to hook up two computer case cooling fans to one standard 120v plug. That’s two fans into one standard 120v outlet.

The fan model is CoolerMaster 120-SI2, which has a 3-pin molex wiring harness. Red wire: 12V. Black wire: 0V (ground). Yellow wire: RPM sensor. Here are the fan’s specs:
Voltage: 12VDC.
Current (Ampere): 0.15 A±10%.
Input (Watt): 1.80W±10%.

Can anyone give me a safe way to wire this up? Without building a new wiring, I would need to buy a 3-pin to 4-pin adapter and an AC power supply for each fan. This is unacceptable because of space and budget limitations. Can anyone help? Thanks!

 

[davenn]

hi
welcome to the forums

I assume you are wanting to use them fans for a non computer related project ?

you could run them both off a single 120VAC to 12V DC 500mA plugpack
they will just be connected in parallel across the 2 wires out of the plugpack
You wont be using the RPM sensor lead

Dave

 

[TheloniousMink]

Just splice it?

Dave,

Thanks for your response. Can I simply splice the plugpack wires to both fans' wires?

 

[davenn]

yup
easy as that


D

 

[TheloniousMink]

Dave,
That works great when I'm powering one fan, but if I hook up two or more, nothing happens. I need to power two (or possibly four) fans from one outlet.