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Power for Coin Mech Lights and Trackball

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mikeyv23:

Well I think I am missing something.  I tried running 1 wire from the Ground on the power supply to one of the leads on the bulb/casing, and another wire from the 12v+ on the power supply to the other lead on the bulb/casing.  I turn on the power for the marquee (which is wired to the the 120v leads and nothing happens...

Do I need to add a diode or a toggle switch?  Or should I be using the power leads on the power supply that the marquee is connected to?

HELP!!

bungy:

Are you sure the bulb works?
Do you have a multimeter?  Use it to make sure you are getting 12 from the power supply.
Are you sure the marquee bulb needs 12v?  I would think it needs 120vAC.

Edit: I just re-read your post and now I'm not exactly sure what you're trying to do.  Do you have 12v wired up to a different bulb? and 120v wired up to the marquee independently?

mikeyv23:

Sorry...

So the marquee is wired to the 120v.  I want to power the 12v lights that are on the coin mechs (4 coin slots) and trackball (1, so 5 in complete total).

When I tried to wire the coin mech lights to the 12v nothing happened.  Now I don't know if this makes a difference, but there is a switch on the top of the cabinet that you have to flip to turn the marquee on (and it used to turn on the entire machine when it was a JAMMA setup).

No matter what I have tried, I could not get the 12v to light.  I am going to try a different bulb later, and double check the voltage first with a multimeter to make sure everything else is working properly as you suggest.  I will post back my findings a little later...

mikeyv23:

So something is definitely amiss with the power supply.  The 120v AC works fine, but the 12v and 5v are not showing anything on my multimeter.  There are some fuses wired to the power supply on the bottom of the cabinet.  They look fine and I have no idea what roll they play (if any).

So in the interest of making this a little easier (and maybe safer) for me I have another idea.  I have a spare power supply from a computer and was wondering if I could easier use that instead and utilize the 12v options on there.  Let me know if this would be relatively easy (or even possible).

I also don't know how I would wire it.  Can I just remove it from the computer, wire it and plug it in?  Does it need an on/off switch?  etc?

Sorry to be such a noob...I am still learning (as you can tell) about the electrical side of this hobby....   :badmood:

bungy:

Standalone PC power supplies are a pain in the ass, you have to short two of the wires on the mobo connector and put a load on 5v to keep it running, or something like that.  If you can find an older one, it might work, but you'll need to wire the 120v directly to it or put a power strip in your cab.  Wouldn't recommend doing any of that unless you know what you're doing.

Remove the fuses and check them for continuity with your multimeter, they may LOOK ok and still be blown.

Is the power supply getting 120v?  Is there a switch on the power supply?
Did you try flipping the switch on the top?

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