Leaning curve

A project log for TinyPi Advance

The next stage of the TinyPi Story

mooseprmoosepr 03/24/2018 at 09:514 Comments

I wanted to build on the work of TinyPi, but also improve upon it. The main goal of the original project was to go as small as possible. While this does give targets and bragging rights a plenty, it also has an impact on the usability of the device. Because the pi sits flush against the back of the pcb, and the screen takes a massive hunk of space, there is then minimal space for the controls.

Moving to the landscape layout, but keeping the screen portrait (they look terrible any other way) meant that there was a touch more space to play with. This space meant that the power switch and the battery connections could be moved to get rid of the wires that poke out on the original design.

While I was making changes, I decided to ditch the 5 way navigation switch in favour of 4 actual buttons, allowing the d-pad to be created. While searching for low actuation force buttons, I found some which looked very much like the buttons used in a Gameboy advance SP. These seemed ideal for my needs, affordable, small, easy to solder, and if it's good enough for Nintendo, then I'm sold!

In the same area, I spotted some right angle buttons that also look very similar to Nintendo ones, and decided I could monopolize on the extra bit of PCB available from the screen rotation, to add 'shoulder' buttons. While I was at it, the start and select buttons could be moved out of the way too.

So the new board was designed, and sent off to oshpark for making


deʃhipu wrote 03/24/2018 at 16:54 point

That looks good, but aren't the shoulder buttons going to get in the way of the Pi Zero connectors? Are you still going to be able to play with the cables plugged in? That could ease debugging considerably.

Do you have a link to the buttons you found?

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moosepr wrote 03/26/2018 at 09:46 point

the face buttons are these -
and the shoulders are these -
you are indeed correct, things clash, that was going to be my next post ;)

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deʃhipu wrote 03/26/2018 at 10:03 point

Thank you! They are very flat!

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moosepr wrote 03/26/2018 at 11:00 point

super flat!! And only 100g actuation force, so nice to press :)

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