First boards ordered

A project log for New PCB For Calculator Watch

I like to call this my smart watch, as it can calculate numbers and show the time

davedarkodavedarko 09/13/2021 at 12:063 Comments

After a longer break I managed to draw the symbols and footprints of the SAML22G and the IR transceiver module, so I would not have to rely on licenses of external sources. With that I was able to finalise a first prototype board and send it to JLCPCB for production. With the recent pink PCBs that boardhouses now produce I was very tempted, but I opted for a set of 5 green PCBs instead. I decided to run the board on 2.5V, which makes it easy for the AP2112K to work with the battery voltages of a LiPo battery, without running into dropout voltages first. There is some room and I'm tempted to add a footprint for a compass chip in the future, but I can always just connect to the QWIIC connector, as long as they are okay with 2.5V. Should have thought about that.


Xasin wrote 09/13/2021 at 19:11 point

Ohooo, these look good!
Ordering boards is always exciting, and compact ones even more so.
Hopefully, it all goes well!

I'm also close to ordering the boards for my #TapV2 badge too, and that step of the project is always so nerve-wracking...

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davedarko wrote 09/14/2021 at 20:52 point

aww thanks! Good luck to you, too then! I'm actually relieved to have send something out, after such a long "break"

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Xasin wrote 09/18/2021 at 16:41 point

I have not ordered yet, and I am *really* glad I waited. I almost ordered the PCB with multiple of the ESP32 strapping pins misconfigured so it might not have booted or been programmable.

Strapping pins are such a nemesis when not marked well - I hope your boards go well and without requiring cut traces.

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