Adding LED powered by PSU

positron77 · Aug 16, 2013

Hi. How can I light a LED light using the PSU? I want to make it power up when my pc opens. Any advice? Thanks.

burdenbound · Aug 16, 2013

If it has a 4 pin molex connection that is generally how you would power something like that. Make sure you PSU has some spare ones you have access to.

positron77 · Aug 16, 2013

Yeah it has some of them. So how can I power it, then? And thanks.

burdenbound · Aug 16, 2013

positron77 :

Can you add a link to what product you are looking at? It should be as simple as plugging it in and when you turn the computer on it will turn on.

positron77 · Aug 16, 2013

burdenbound :

Lol it is a simple led light.

burdenbound · Aug 16, 2013

Oh ok literally a single LED, you are probably better off with the connectors on the motherboard...Google 3 pin fan pinout and connect to ground and +12V. That is if your little LED supports that voltage.

burdenbound · Aug 16, 2013

Or are you using this as a replacement for the standard power LED located on most cases?

--Edit--
It looks like most LEDs are 5V in which case the pinout for a 4 pin molex is 12V Ground Ground 5V. You could probably hook it up to the 5V and ground, but might be a little tricky.

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Adding LED powered by PSU

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