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plugging in fans on +12V to +5V on molex to get 7V


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Thanks for the nice find! Although that is just resistors and a switch really, its in a useable form so i will definitely look for it in sweden :)

 

I can't tell how it's wired exactly but because it uses diodes and not resistors I suspect the fan voltage settings will be something like 12V, 10V and 8V for high, medium and low. Each diode, probably something like the 1N4001 or similar, will drop approximately 0.6V~0.75V each so three used for each step.

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Yes Paul, they seem to be 1N400x. A very cheap regulator with poor efficiency, but that's another discussion.

But isn't that exactly what he was going to have any way? This way he gets one that is already put together that he can change quickly and not have to do any real wiring.

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