Pimping My Casio: Part Deux
31 comments
·July 19, 2025thebruce87m
jgrahamc
Argh. Motherducking autocorrect!
zippyman55
Respect.
teruakohatu
I have been reluctantly holding off hoping they will come out with a dot matrix or epaper screen. Neither will probably ever happen but I can dream.
simgt
There is this one: https://gitlab.com/_Pegor/kepler_fw
Disposal8433
> git clone --recurse-submodules [...]
Small improvement but it should get the clone and the submodules at the same time.
throwanem
Admittedly my watch only gets 1/50 the battery life and doesn't pick up WWV. On the other hand, being able to redesign its face in Emacs and Illustrator and update it OTA makes up for a lot. So does not having to wear a molded polymer bracelet - those things are awful!
BenjiWiebe
What's wrong with molded polymer bracelets? I assume you're referring to the wristband? I've really only worn one watch and it has a molded polymer wristband, and it doesn't bother me, but maybe I'm missing out on something nicer.
_false
What's the process of adding sensors to the custom motherboard? Based on your watchface config it looks like you added accelerometer. I wonder what other sensors are easy to add. I'd love to have an hrm in mine
jgrahamc
There are details on the sensor part here: https://www.sensorwatch.net/docs/sensorboards/ and reference designs here: https://github.com/joeycastillo/Sensor-Watch/tree/main/PCB/S...
neom
This, is how to enjoy your retirement. Hope we see lots of other fun projects like this from you John, a very enjoyable read. :)
jgrahamc
This is a really simple "project" because someone else did all the work! I just had to install the thing and make some tiny code modifications for my taste.
ajsnigrutin
TSA: "Sir, are you wearing the terrorist watch?"
You: "no no, it's a modified terrorist watch, it now has more features!"
https://www.spiegel.de/international/world/al-qaida-s-watch-...
https://www.watchesofespionage.com/blogs/woe-dispatch/casio-...
jgrahamc
Typically I wear this watch instead: https://blog.jgc.org/2025/06/the-discreet-charm-of-infrastru...
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dustypotato
brb gotta buy a casio lineage watch now
rwmj
IMO the Casio Oceanus S100 is a better watch in that category - solar powered, radio-controlled, waterproof, no apps or connectivity, but more dressy. However it's JDM only so you have to order it off eBay (or buy it on a trip to Japan I suppose).
eabeezxjc
is any Linux version? I'm not using brew
jgrahamc
Windows, macOS and Linux instructions here: https://www.sensorwatch.net/docs/movement/building/
teruakohatu
Brew run on Linux just as well as on MacOS.
mikae1
It’s actually the default package manager for uBlue distros.
I’ve used it as my only package manager on Linux for a few years and I love it.
justmarc
Very cool! What's the expected battery run time?
jgrahamc
See: https://www.crowdsupply.com/oddly-specific-objects/sensor-wa... Answer: 1 to 2 years. My previous watch from the original blog post is still running on the original battery.
justmarc
Thank you, John.
Coincidentally, your web site https://jgc.org/ is truly a lovely example of https://news.ycombinator.com/item?id=44613625 which was just discussed today as well.
Love your behind the screens stuff!
jgrahamc
Thanks! Glad you enjoy https://behind-the-screens.tv. Those videos were an enormous amount of work because of all the original research behind them. I do have one more I'd like to do about this film: https://www.rottentomatoes.com/m/defense_play_1987 One day perhaps!
TMSai
[dead]
> Since I bought the optional accelerometer add on it's necessary to put in place a little piece of caption tape
This should be _Kapton Tape_ https://croylek.com/pages/kapton-tape?srsltid=AfmBOoqVfkbfaW...