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hi everyone, im working on my first small electronics build, a handheld retropi. ive decided to use a teensy to make building the controller simpler for me. its a teensy 3.6. I'm not too familiar with interpreting the pin chart that it comes with. I know that the ones with an A can be used for analog devices such as joystick potentiometers. I'm wondering if there are limitations on which pins can be used for simple tach buttons. My controller design calls for roughly 20 buttons: 7 "regular ...

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