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Led Button Wiring for mame cab.

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sham69:

Hi,
I am putting some finishing touches to my mame cab that I have been tinkering with for the past 7 or 8 months.
I decided a while back to use some led buttons mainly just for 1 and 2 player, exit, pause etc not the actual action buttons.
I thought this would be pretty straight forward so gave it a go yesterday.
Here's what I did.

I used my 1 player button to start.
I used some spare ground wire that I had from the harness that I got from my ultimarc ipac.
I took the power from my pc using the red wire (+5 volts), joined it with the harness wire and conencted it to the button using the quick connects (already on the wiring).
I got nothing?
I tried grounding it and still nothing.
What am I doing wrong?
I bascially just want 4 buttons to stay lit the whole time (1player, 2 player, exi and pause)
Do I need software to get them to light?
Can someone suggest the best way to do this please?
I got the buttons on ebay with the leds already attached.
I was thinking of trying some electric ice buttons if I get my current setup working.
Any help/advice appreciated as I am not good at electrics at all.
Thanks
Sham.

surface tension:

Sham

Do the LEDs already have an integrated resistor... does it say "5V" on them?

I'm sure you would have noticed them glowing too bright (though not for very long!) if they weren't ready to go.

So, you are connecting 5V to one contact on the LED and 0V to the other, right? Did you try swapping them round too?



sham69:

Not sure about the resistor to be honest, will have to check when I get home.
I first tried the 5v to the contact and it didnt work so decided to try the ground aswell (read somewhere that I don't need to use the ground) and still nothing.
Tried swapping them around aswell.
The wire I am using is jioned in a few places so could be that.
I am going to try again when I get home.
Thanks for the reply I will check the resistor thingy..
Sham.

surface tension:

I'm not sure where you read about not needing a ground, but conventional current must flow from +V ot 0V. You will need two connections per LED.

Remove all links in the cable and locate the LED/switch by the power source. Build up a little confidence with how it works, then you can get building/wiring.

If you are attempting any wiring, then a multimeter is extremely useful. With your current setup, you'd have been able to check that joined wire for continuity, as well as look for 5V across that wire and ground. You'll be able to pick one up for under a tenner.

BobA:

You say you got LED buttons.  Can you say what type they are so we know what contacts and wiring is used on them.



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