Its just the same like a reset / turbo led / hdd one.. (its a two pin female type) But it only requires 5VOLT positive. Do not put 12volt on this thing, or it will burn the display.

Robin4 wrote:

Its just the same like a reset / turbo led / hdd one.. (its a two pin female type) But it only requires 5VOLT positive. Do not put 12volt on this thing, or it will burn the display.

Forgive my ignorance here.. but I'm not sure if I follow... Can you expand on that?

Some AT power supplies had a 5v power line that ran directly out the back of one of the molex plugs, and these could be used to power these displays. If your PSU doesn't have one of those, then you can add your own (easy enough) or buy one of these:

http://www.ebay.com.au/itm/Molex-4-pin-to-2-p … 6a73273a&_uhb=1

Does the one you've bought fit the case? They rarely do in my experience - each case had it's own size / mounting hole setup. And wiring them up also varied from case to case. Can you provide some more information about what writing exists on the case for the turbo function, and a close up shot of the LED display?

It was kind of an impulse buy since it was rather cheap, but I think it will fit with a little creativity.. The mounting holes certainly don't line up but I think the area where the numbers are should fit well enough (in theory). I don't have any documentation about the turbo button on the case either.. 🙁

Obviously, all those jumpers on the back are for telling the unit what to display (one side for on, one side for off). The right angled pins will be for power and toggling the unit on / off based on the turbo button position on the case, and maybe some for powering the single turbo LED on the front of the case - trial and error will have to be used to determine which are which.

As I say different cases implement this differently but for example, the case I'm using with my Asus VL/I-486SV2GX4 is wired like this:

turbo switch wire on the case --> tb_sw header on the motherboard.
a single wire runs b/w the tb_led header on the motherboard and the LED Mhz display - this is what toggles it on / off
the single LED power wire on the case is connected to the header on the LED Mhz display - this toggles on / off with the turbo button.

In short they're a massive pain in the ass, but worth the effort IMHO!

I have one of these in another 486 and it works fine, but it came with the case and has clear documentation. This one is a little tricky - still not sure how to work with those two rows of 4 gold pins. I may put this little project on hold. 😀

I would suggest starting by looking for pins connected to ground. The +5V pin has to be adjacent to ground.