scada wrote:

"DelphiDude" wrote in message
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We have a bunch of perfectly good ethernet switches which have bad fans.
The problem is that the fans are 5 volt and the only power available in
the box is also 5 volts.

So far, the little 1&1/2 inch fans are not available anywhere that we can
find, but are an exact physical match for 12v CPU fans on older PCs, which
we have a ton of.

They take only a few mils to run.

Does anybody know of a dc to dc converter chip or a simple circuit that I
could mass produce to convert 5vdc to 12vdc? A voltage doubler maybe?

Thanks

DD


The LMC7660 should do the trick!


the fans should need approx 100mA @ 12VDC. You have to check the fans!
a LMC7660 can not produce that much power. A 3-6Watt 5/12VDC switcher maybe.
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