Finch
New member
So I finally got around to reinstalling the lights in my Midway cocktail cab, and when I turn it on the speakers whine. if I unplug any of the 3 sets of lights it stops.
The lights are 3 sets of 2 bulbs for the two control panels and coindoor 24cent windows, they are just wired directly to the switching PSU on the 12v line.
I figure my PSU is plenty strong enough to handle these, but what causes the whine? could it be that something isn't grounded properly? The earth ground for my coindoor isn't hooked up at the moment because nothing is hooked up on the coin door except the lights. The other two sets of lights are attached to the control panels, which are grounded to earth ground.
They are regular incandescent bulbs, so unless something is really weird it doesn't matter which lead is 12v and which is ground so that shouldn't be an issue. The lights work perfectly.
The lights are 3 sets of 2 bulbs for the two control panels and coindoor 24cent windows, they are just wired directly to the switching PSU on the 12v line.
I figure my PSU is plenty strong enough to handle these, but what causes the whine? could it be that something isn't grounded properly? The earth ground for my coindoor isn't hooked up at the moment because nothing is hooked up on the coin door except the lights. The other two sets of lights are attached to the control panels, which are grounded to earth ground.
They are regular incandescent bulbs, so unless something is really weird it doesn't matter which lead is 12v and which is ground so that shouldn't be an issue. The lights work perfectly.