Expanding GPIO pins

This topic contains 2 replies, has 2 voices, and was last updated by Profile photo of mexeroser mexeroser 1 year, 12 months ago.

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  • #100897
    Profile photo of mexeroser

    Hey guys!
    Im trying to build a Rpi arcade at the moment. So far so good, i got one joystick and some buttons working.
    The problem i got is: I would really like to build it for 2 players, but I would not have enough GPIO pins.
    I bought this https://www.adafruit.com/products/1171 at first, but actually that cannot work because it literally doubles the gpio pins, so that if i trigger one button for example, it would trigger the one connected to the pin right next to it as well. (correct me if im wrong, im a total noob in this regard)

    My question is: If my assumption is right, and the perma proto board that i bought does not work, what would help/ might this be something worth buying:

    Thank you in advance, i really appreciate help from anybody!

    Profile photo of midimax

    ControlBlock ? (with some additional features)

    ControlBlock: Power Switch, Game Controllers, and I/O for the Raspberry Pi

    Or if you want to build it completely yourself using MCP23017 like ControlBlock or the “IO Pi” from your second link does is the correct way.

    Profile photo of mexeroser

    Thank you very much!

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