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Going to use gpio for the first time

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I've been working on a project designing my very first keyboard
matrix. It's not a normal setup, it'll serve as external input for my
tandy pocket computer. Well, V1 will be at least.  

I chose an atmega MCU as suggested by an online buddy and was delighted
to learn that I can program it with my rpi's gpio.

So I ordered a header adapter/expander from pishop. This gave me a
chance to order a few other things I've been putting off, like getting
an inexpensive case for my workhorse 3b+. Also got the inexpensive
(almost cute) gpio reference board for the hell of it.

Are there any newbie things I should look out for while I dive in?
I'll be doing all the work on my trusty stock pi500.

--
Daniel
sysop  | air & wave bbs
finger | calcmandan@bbs.erb.pw

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Going to use gpio for the first time Daniel <me@sc1f1dan.com> - 2026-04-21 09:53 -0700
  Re: Going to use gpio for the first time rbowman <bowman@montana.com> - 2026-04-22 00:54 +0000
    Re: Going to use gpio for the first time Daniel <me@sc1f1dan.com> - 2026-04-22 07:09 -0700
  Re: Going to use gpio for the first time Michael Schwingen <news-1513678000@discworld.dascon.de> - 2026-04-22 16:08 +0000
    Re: Going to use gpio for the first time The Natural Philosopher <tnp@invalid.invalid> - 2026-04-22 20:40 +0100
      Re: Going to use gpio for the first time druck <news@druck.org.uk> - 2026-04-22 21:09 +0100
        Re: Going to use gpio for the first time The Natural Philosopher <tnp@invalid.invalid> - 2026-04-22 21:13 +0100
          Re: Going to use gpio for the first time Theo <theom+news@chiark.greenend.org.uk> - 2026-04-22 23:45 +0100
            Re: Going to use gpio for the first time The Natural Philosopher <tnp@invalid.invalid> - 2026-04-23 09:58 +0100
          Re: Going to use gpio for the first time not@telling.you.invalid (Computer Nerd Kev) - 2026-04-25 08:33 +1000
    Re: Going to use gpio for the first time Daniel <me@sc1f1dan.com> - 2026-04-22 23:55 -0700
      Re: Going to use gpio for the first time rbowman <bowman@montana.com> - 2026-04-23 18:35 +0000
  Re: Going to use gpio for the first time Gordon Henderson <gordon+usenet@drogon.net> - 2026-04-23 12:36 +0000

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