Have you checked out pinballmakers.com page on OPP? That may be able to answer some questions.
(Topic ID: 278199)
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1 month later
Quoted from TheSupremePapaya:Well, I was cutting and crimping all day. Connected some switches, feeling smart and... I lost my nerve when I was going to connect power.
So the cobrapin board has 2 vin and 2 gnd for both the high voltage and 5v. The super helpful cobrapin wiring diagram (not sarcasm, love that thing!) shows two red / two black going into presumably separate channels on the PSU.
My psu has only one channel for each voltage and com.
[quoted image]
Should I run two wires into the PSU channel or can I use 1 vin and 1 gnd on the board inputs?
I'm not sure why there are two grounds for the 5v power. I haven't used cobrapin before, but on my fast pinball board you just have one ground for each voltage. One of the reasons for having two inputs for voltage is because the .156" connectors are rated for no more than 7 amps. By having two inputs you cut whatever amount of amps you are drawing in half. (i.e. if you were drawing 8 amps at 5v, you could split the output from your psu into to inputs to your board, so you only have 4 amps one each connector). You can just connect two wires to each output from your psu, which is easy, plus you don't risk making your connectors all crispy.
I don't know how many amps you are going to be using, but I would say that if you are drawing more than 6 amps for any voltage, I would run two inputs into your board.
Don't quote me on this because like I've said, I've never used cobrapin before. However I think this should be true for most controlling systems (p3, cobrapin, fast etc.). Hopefully this made sense, and good luck!
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