Connecting button PCB to Pi [SOLVED]

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mrsippy
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Connecting button PCB to Pi [SOLVED]

Post by mrsippy » Thu May 23, 2019 1:03 am

Hi all,

I'm looking to connect this button PCB:

Image

I have downloaded and installed on my SD card Tinkerboy's modified Retropie image with built in GPIO controller support: https://www.tinkerboy.xyz/retropie-sdca ... r-support/

I had intended to follow the wiring guide on the above-linked page but was just surprised to see that "Up" should be connected to GPIO04, and "Down" should be connected to GPIO17. https://pinout.xyz/ tells me that GPIO04 is 5V power, and GPIO17 is 3.3v power. None of the other buttons are connected to pins on the Pi which supply power. A couple of buttons are also connected to ground pins, i.e. "B" to GPIO06, "SELECT" to GPIO20.

On the other hand, in this thread: viewtopic.php?t=57 none of the buttons are connected to either pins supplying power, or to ground pins, which seems more logical to me, but I am quite new to this sort of thing.

Should I follow Tinkerboy's wiring guide on the above-linked page?

Many thanks.
Last edited by mrsippy on Thu May 23, 2019 6:36 am, edited 1 time in total.

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VeteranGamer
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Re: Connecting button PCB to Pi

Post by VeteranGamer » Thu May 23, 2019 2:11 am

the GPIO are as follows.....


follow the diagram and pair it up to which ever guide you want to use....
NOT the order of the GPIO (ie: 1,2,3,4)


rpiAp-08.png
rpiAp-08.png (378.57 KiB) Viewed 99 times

GPIO 4 is the 7th GPIO on the RPi (the 7th GPIO is NOT GPIO 7)
(the 4th GPIO is the 5v, it is NOT GPIO 4)





.

mrsippy
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Re: Connecting button PCB to Pi

Post by mrsippy » Thu May 23, 2019 2:32 am

Wow, thank you Veteran, lifesaver!

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