You shouldn’t plug anything into the USB ports unless you know how much power your mod draws and the capacity of the USB port. There are safer ways to draw power, including 5v at the coindoor node board.
(Topic ID: 295208)
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Quoted from twhtalm:According to the spike2 shematics the main MPU is a MCIMX6U5DVM10AC. The datasheet states the max current per USB port is 25mA.
That is barely anything. I’m surprised you could run more than a handful of leds off that.
Quoted from gdonovan:The MPU supports 4 channels, I sincerely doubt it powers them as well.
Its a generic multimedia MPU that is used for a wide variety of tablets and such so I doubt it is a limiting factor.
There are better and known safer places to pull 5v, I would not do it off the cpu. Of course, it won’t be as easy as plugging into a USB port. The power distribution board in the backbox has readily available 12v, stern uses it for many of their toppers. There is also open 5v and 12v headers at the coin door cabinet board that are made to run accessories like bill acceptors and ticket dispensers. You’ll have to know how to crimp and pin and identify and buy the connectors, the pinouts are in every manual, but it’s the way to do it properly. The connections are rated for 2a, though I still would not want to draw too much power off these boards.
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