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Arduboy MAX

using a 2.42" OLED display and Game Boy buttons with a diy board around the atmega32u4

davedarkodavedarko
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work in progress

I would have preferred to use one of the many spare arduino pro micros, but the arduboy gang used pins that aren't broken out on. So I've bought 2 TQFP atmega32u4 chips and started to design a board.

  • Reworking two prototypes

    davedarko • 04/15/2020 at 22:05 • 0 comments

    Not sure what has happened when I soldered the boards, but I never really got them to work properly. I just spend an hour on reworking and cleaning a board, but I've must have killed the chip doing that. Before it was accepting the bootloader, but now both boards are completely gone.

    One spare board from the first batch is missing the chip and I'm considering to remove everything what's on there, cleaning all the pads and try everything with a low temp solder paste and new parts. It still bugs me that everything is running off of the battery voltage on the arduboy.

    Or I'll just slap a known Atmega32u4 board on there and call it a day. 

  • for those who don't want to wait on smth that might never happen :p

    davedarko • 01/17/2019 at 18:55 • 0 comments

    Someone did something very similar

    https://www.thingiverse.com/thing:3250270/

  • sponsored by aisler

    davedarko • 07/12/2018 at 16:00 • 3 comments

    They've contacted me via instagram - like oh so many pcb fab houses do these days - and offered a free run - couldn't say no! I've added test points to attach the RGB LED, not so keen on using it, but wanted to have the option. The display will be soldered via wires. There's no battery protection on it, only a charger. Extra pads for I2C. Additional test points for vcc and gnd. Buttons will be classic Game Boy pads. 

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deʃhipu wrote 10/27/2019 at 21:52 • point

You must have taken measurements of those plastic parts for the d-pad and buttons — I wonder if you still have them somewhere? I'm considering using them for my project, but I really don't want to order one of each kind, and the wait for them, just to take measurements. In particular, I wonder what the clearance between the PCB and the front plate is?

  Are you sure? yes | no

davedarko wrote 10/27/2019 at 22:36 • point

The PCB sit's on a 6mm high screw post, the silicone pads have 1mm between the PCB and the next bit of plastic.

  Are you sure? yes | no

deʃhipu wrote 10/28/2019 at 08:02 • point

Thanks!

  Are you sure? yes | no

Hendra Kusumah wrote 06/10/2018 at 21:24 • point

Oh yeah btw, Loving this arduboy XL project :). 

  Are you sure? yes | no

Hendra Kusumah wrote 06/10/2018 at 21:22 • point

There is an alternative bootloader if you want to stick with pro micro. And I think pro micro pins is already capable if you don't use the RGB led.

https://github.com/MrBlinky/Arduboy-homemade-package

  Are you sure? yes | no

davedarko wrote 06/11/2018 at 07:27 • point

hm, the pinout of the SPI display uses pins (CS, DC) that aren't broken out on the Sparkfun pro micro I have. The goal is having the same experience without "tinkering with bootloaders". But thanks a bunch for the link, might come in handy if it doesn't work the way I thought! :)

  Are you sure? yes | no

deʃhipu wrote 06/10/2018 at 19:38 • point

Have you considered a teensy 2 or a-star mini? The latter has interesting colors too! (and no, I'm not saying you should use them, making your own is much cooler)

  Are you sure? yes | no

davedarko wrote 06/10/2018 at 20:20 • point

oh you mean to check if all the pins are broken out? I could check that on a teensy, good idea, thanks!

  Are you sure? yes | no

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