Re: Strange noises from the computer

[ Apologies if this post eventually appears in double ; originally I tried
to post through eternal-september and the post did not appear. ]

On Sat, 13 May 2023 13:15:47 -0400
Paul <[email protected]> wrote:

Thanks for all the detailed information.

[...]

> Fans can be run from 12VDC. You only need two electrical connections, to make
> a fan that spins at 100% speed. I sometimes test 12V fans with a 9V battery
> (the fan might be rated at 110 ma or so, a 1 ampere fan might be too much
> for a small 9V battery).
> 
> In this example, the picture of the cable is wrong, the table of values is correct.
> Red should be the middle wire, and is +12V. Always check the hub label, for any
> hints about what you're dealing with.
> 
> https://europe1.discourse-cdn.com/arduino/original/4X/6/1/2/612cffb8df33a95d9ef9dc9200779ec41e266c38.jpeg
> 
> In this example, the bottom-right picture is correct. Sometimes, the motherboard
> manual has a diagram too, as a double-check. The "tab" on the fan connector,
> is what provides keying, so the correct pins touch.
> 
> https://www.dell.com/community/image/serverpage/image-id/58153iDEAF116614EE11FA/image-size/large?v=v2&px=999

Is there some gadget you can buy where you simply connect the wires of the
fan , put a battery in some compartment and the fan spins (ideally you
should be able to adjust the speed too) or do you have to construct one
yourself using pictures like those you provided ?