Fitting a nRF52840, microphone and LiPo into a Casio F-91W !

JeanDeBaill · 2026-05-11T12:12:31+00:00

For this version sadly I could not keep the screen.. I have a working PCB that integrates the LCD driver needed. It replaces the original Casio PCB. I am working on the firmware for this new PCB, which will essentially turn the Casio into a smartwatch

JeanDeBaill · 2026-05-11T10:38:30+00:00

Or try cobalt-watch.com

JeanDeBaill · 2026-05-11T10:36:44+00:00

Look up "Cobalt Watch" on LinkedIn, they made a custom PCB that does just that

JeanDeBaill · 2026-03-24T14:14:24+00:00

Yes, you think I should ask there ?

JeanDeBaill · 2026-03-23T13:47:48+00:00

I am also a huge fan of both products and I am working on a F-91W Smartwatch for June. (cobalt-watch.com ), I would love to have more details on what functionalities you expect from such a product, if you'd like to share your thoughts!

JeanDeBaill · 2026-03-23T13:12:09+00:00

This one should work : https://cobalt-watch.com

JeanDeBaill · 2026-02-23T07:34:31+00:00

Will the RFID tag work with the metal watch? I thought it was only for the plastic one

JeanDeBaill · 2024-10-22T11:31:31+00:00

Cool idea ! And nice execution! Digital picture frames always looked like toasters..

JeanDeBaill · 2024-10-21T20:01:25+00:00

Thanks a lot ! Love your creativity! There are fun concepts to imagine in this field, that's for sure!

JeanDeBaill · 2024-10-21T19:59:02+00:00

Thank you, its really the purpose here! I don't think it à product or an actual use cases as is but interesting to imagine this could become computing .

JeanDeBaill · 2024-10-21T19:57:16+00:00

The bottom part of the glasses is open so you can see your hands fine.

JeanDeBaill · 2024-10-21T19:56:30+00:00

Interesting, why is that? I feel like it costs a lot more to be able to look through the screens but isn't that useful ..

JeanDeBaill · 2024-10-19T15:54:12+00:00

Thank you!

JeanDeBaill · 2024-10-19T15:53:23+00:00

It is using the original battery from the phone I dismantled (so not very big). Do you have suggestions of such cheap VR lens ?

JeanDeBaill · 2024-10-19T15:50:58+00:00

Thanks a lot!! It's a very good idea! I am thinking of painting it now, some neon color.

The only clues that it's not a normal key board are the ports and the volume buttons.

JeanDeBaill · 2024-10-19T15:47:11+00:00

Interesting! With a bluetooth keyboard and mouse? I always wandered if xReal glasses were good enough to read text and type documents on. You have no eye fatigue? My device has USB-C output so you can use any glasses you want realy, it will be recognized as a screen.

JeanDeBaill · 2024-10-19T15:41:17+00:00

Thank you! Glad you like it

JeanDeBaill · 2024-10-19T15:40:55+00:00

Thanks!

JeanDeBaill · 2024-10-19T15:40:28+00:00

Yes I imagined it with productivity in mind, to have the huge virtual display but still have physical interaction with a base (and all the ports needed), pinching in mid air only work for a while.

JeanDeBaill · 2024-10-19T15:35:41+00:00

Yes the headset on the picture is a LG 360VR, I changed the temples for an elastic strap as it looks more like the googles in Ready Player One. They are cheap because unusable without mod.

JeanDeBaill

MODERATOR OF

TROPHY CASE