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Delta boards released!

A project log for ZeroPhone - a Raspberry Pi smartphone

Pi Zero-based open-source mobile phone (that you can assemble for 50$ in parts)

ArsenijsArsenijs 05/24/2018 at 00:402 Comments

The new revision, ZeroPhone Delta, is out. I've been using a Gamma ZeroPhone for quite some time now, and it needs some bugfixes. Specifically, I:

Here's what I added:

I also removed a lot of things that didn't prove themselves useful:

OSHPark links: 18650 board, back board, front board, keypad board and speaker adapter


Some of these points (like silkscreen additions) could be explained further, but I'll show them off once I receive the boards and make the assembly guides. This is pretty much the gist of the Delta release. There's a lot of safety, usability and reliability fixes - not so much in terms of features, but, as you know, adding things means adding bugs, and I couldn't really afford to have a lot of those in this revision. This revision is the one I'll be promoting once I get it and assemble a phone or two - I finally feel like i can put trust in a revision that I've made, and I can safely calculate the crowdfunding campaign expenses  based on its BOM.

Now what? I need to do a bunch of work on software. A new SD card image is long overdue (and I really need to look into automatically building these), and I finally can work on integrating the part that deserves my attention the most - the GSM modem. I will also make a video assembling a Gamma ZeroPhone from scratch - I don't think making full-blown assembly instructions is a good idea (since even the errata takes too much time), but I'll be doing that for the Delta model.

Heads up - I've also designed a ton of expansion boards (many of them at the last couple of days before ordering). There's even a cool SPI level shifter - it shifts 3.3V to 1.8V if you insert it one way, or 3.3V to 5V if you flip it over! Hope you like them - compiling a list of them soon ;-P

Discussions

kunstenaar wrote 05/31/2018 at 20:22 point

Nice to see this progress...

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Daniel Margarido wrote 05/24/2018 at 10:03 point

Really cool man! Thanks for the good work :)

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