Pimping My Casio: Part Deux

https://blog.jgc.org/2025/07/pimping-my-casio-part-deux.html

104•r4um•8h ago

Comments

ajsnigrutin•6h ago

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•5h ago

Typically I wear this watch instead: https://blog.jgc.org/2025/06/the-discreet-charm-of-infrastru...

dustypotato•5h ago

brb gotta buy a casio lineage watch now

rwmj•1h ago

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).

_false•6h ago

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•5h ago

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...

justmarc•5h ago

Very cool! What's the expected battery run time?

jgrahamc•5h ago

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•5h ago

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•5h ago

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!

justmarc•5h ago

Oh I don't doubt it! I was thinking how does such a busy man have time for this... but we always have time for passions and side projects :)

The airwolf one was funny, since it was a childhood favorite, and what a funny little typo they had there.

When watching the video I was thinking to myself, could this series have influenced my future interests in ways I didn't even know? Fun.

jgrahamc•3h ago

The key to doing things when you're very busy is to do them slowly and not drive yourself crazy with a deadline. When I did the ThinkPad 701c restoration it took me a year!

justmarc•2h ago

Old Thinkpads were truly glorious machines. Top notch engineering and materials.

eabeezxjc•5h ago

is any Linux version? I'm not using brew

teruakohatu•5h ago

Brew run on Linux just as well as on MacOS.

mikae1•2h ago

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.

jgrahamc•3h ago

Windows, macOS and Linux instructions here: https://www.sensorwatch.net/docs/movement/building/

teruakohatu•4h ago

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.

beefsack•4h ago

I absolutely loved my Pebble. It was so amazing in its own niche.

mbirth•4h ago

You do know that Pebble is back from the dead?

https://repebble.com

simgt•4h ago

There is this one: https://gitlab.com/_Pegor/kepler_fw

thebruce87m•3h ago

> 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...

jgrahamc•3h ago

Argh. Motherducking autocorrect!

throwanem•3h ago

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•1h ago

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.

neom•3h ago

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•3h ago

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.

Disposal8433•3h ago

> git clone --recurse-submodules [...]

Small improvement but it should get the clone and the submodules at the same time.

zippyman55•1h ago

Respect.

Nobody Knows How to Build with AI Yet

Linux and Secure Boot certificate expiration

Known Bad Email Clients

Fstrings.wtf

My Self-Hosting Setup

Hyatt Hotels are using algorithmic Rest “smoking detectors”

Babies made using three people's DNA are born free of mitochondrial disease

Valve confirms credit card companies pressured it to delist certain adult games

A 14kb page can load much faster than a 15kb page (2022)

Pimping My Casio: Part Deux

I avoid using LLMs as a publisher and writer

OpenAI claims Gold-medal performance at IMO 2025

Piramidal (YC W24) Is Hiring a Full Stack Engineer

Advertising without signal: The rise of the grifter equilibrium

How to write Rust in the Linux kernel: part 3

YouTube No Translation

Asynchrony is not concurrency

Astronomers use colors of trans-Neptunian objects to track ancient stellar flyby

N78 band 5G NR recordings

Meta says it won’t sign Europe AI agreement, calling it an overreach

Zig Interface Revisited

An exponential improvement for Ramsey lower bounds

A CarFax for Used PCs: Hewlett Packard wants to give old laptops new life

Debcraft – Easiest way to modify and build Debian packages

Bun adds pnpm-style isolated installation mode

Mr Browser – Macintosh Repository file downloader that runs directly on 68k Macs

Broadcom to discontinue free Bitnami Helm charts

Felix Baumgartner, who jumped from stratosphere, dies in Italy

Silence Is a Commons by Ivan Illich (1983)

What is the richest country in 2025?

Nobody Knows How to Build with AI Yet

Linux and Secure Boot certificate expiration

Known Bad Email Clients

Fstrings.wtf

My Self-Hosting Setup

Hyatt Hotels are using algorithmic Rest “smoking detectors”

Babies made using three people's DNA are born free of mitochondrial disease

Valve confirms credit card companies pressured it to delist certain adult games

A 14kb page can load much faster than a 15kb page (2022)

Pimping My Casio: Part Deux

I avoid using LLMs as a publisher and writer

OpenAI claims Gold-medal performance at IMO 2025

Piramidal (YC W24) Is Hiring a Full Stack Engineer

Advertising without signal: The rise of the grifter equilibrium

How to write Rust in the Linux kernel: part 3

YouTube No Translation

Asynchrony is not concurrency

Astronomers use colors of trans-Neptunian objects to track ancient stellar flyby

N78 band 5G NR recordings

Meta says it won’t sign Europe AI agreement, calling it an overreach

Zig Interface Revisited

An exponential improvement for Ramsey lower bounds

A CarFax for Used PCs: Hewlett Packard wants to give old laptops new life

Debcraft – Easiest way to modify and build Debian packages

Bun adds pnpm-style isolated installation mode

Mr Browser – Macintosh Repository file downloader that runs directly on 68k Macs

Broadcom to discontinue free Bitnami Helm charts

Felix Baumgartner, who jumped from stratosphere, dies in Italy

Silence Is a Commons by Ivan Illich (1983)

What is the richest country in 2025?

Pimping My Casio: Part Deux

Comments