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Use a low-RPM motor to connect with the computer PSU

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Naomouang
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Friday, November 03, 2017 8:13 AM (permalink)
My ongoing (beginner) case-modding efforts have led me to desiring a spinning globe within my computer case. I would like to use a low-RPM (something between 4 and 20 rpm) for that and connect it to the PSU to power it.
I have an IT background, but absolutely no clue about electrical engineering and the utmost respect for all of the magic happening there. Therefore, I've searched a lot about the topic, but failed to find definite info, thus I turned here.
I haven't yet bought a motor because I wasn't sure which one would be appropriate, but I think I'd need a motor like this one:

My PSU is an EVGA SuperNova 80+ Gold G2 550W and has plenty of connection options.
  • My guess was that I could connect that motor to a 12V line, like the ones used for powering fans or components. I'm highly uncomfortable with trying though, so I'd really like to have an expert opinion...
  • if it is safe at all (I'd like my computer to live long and prosper) ?
  • which motor would be best (like the one depicted above?) ?
  • which internal slot cable to use (12V processor, molex, fan, ...) ?
how to connect which cable to which slot ?
Can anybody please help me?
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    bob16314
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    Re: Use a low-RPM motor to connect with the computer PSU Friday, November 03, 2017 11:09 AM (permalink)
    It's not the voltage that's at issue, it's the amperage..Motherboard fan headers are limited to a few amps at most and can be either voltage controlled or PWM speed controlled and can be turned on/off depending on the motherboard and can also be controlled through software..Motors like that have no PWM feedback circuitry built in, but may still work, although with no PWM speed control..Molex, CPU and other +12V connectors from the PSU supply a constant non-controllable voltage and +12V amperage is usually 18A at least..I can't see that little motor drawing any more than an amp, but you'd need to check on it.

    Spinning globes were cool back in the day..Still are.
    https://www.youtube.com/watch?v=pMvHuxjFoNo

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