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Civic Hygiene – avoid building technologies that could be used by a police state (2013)

https://shkspr.mobi/blog/2013/11/civic-hygiene/
122•felineflock•38m ago•57 comments

Geolocating a random island using geometry and CUDA programming

https://yassa9.github.io/osint/gralhix-004/
233•yassa9•4h ago•47 comments

A joke domain purchase turned in geopolitical warfare

https://sprocketfox.io/xssfox/2026/08/19/sondehub-and-war/
315•kareiva•5h ago•41 comments

OpenLogi

https://openlogi.org/en
1302•amatheus•14h ago•357 comments

Microgpt in pure C hits 10M tps on Apple m5

https://github.com/vixhal-baraiya/microgpt-c
48•dhorthy•1d ago•10 comments

Launch HN: OneCLI (YC S26) – OSS sandboxed agent harness for teams

https://github.com/onecli/onecli
4•guyb3•16m ago•0 comments

PostgreSQL for Everything

https://www.raphaelbauer.com:443/posts/postgresql-everything/
157•karlmush•3h ago•107 comments

Moderna reports first positive Phase 3 for mRNA neoantigen therapy in melanoma

https://twitter.com/NoubarAfeyan/status/2090050162441752787
273•heydenberk•3h ago•111 comments

Devices with GrapheneOS support should be available in 2027

https://grapheneos.social/@GrapheneOS/117078064184215730
447•exceptione•4h ago•265 comments

Remote workers report the highest well-being in study of 7,700 employees

https://www.colorado.edu/today/2026/08/12/remote-workers-report-highest-well-being-study-7700-emp...
81•downbad_•1h ago•34 comments

Ornith-1.5: From Self-Scaffolding to Self-Improvement

https://ornith.ai/ornith_1_5.html
23•CommonGuy•1h ago•2 comments

Air Theremin – a browser theremin you play by waving at your webcam

https://theremin.bizibah.com/
165•gurov•6h ago•65 comments

Taffy: A flexible, high-performance, cross-platform UI layout library

https://github.com/DioxusLabs/taffy
59•robin_reala•6d ago•23 comments

Extensible Software in the Age of LLMs

https://jeremymorrell.dev/blog/extensible-software-in-the-age-of-llms/
3•coloneltcb•19m ago•0 comments

Chain-of-Thought Reasoning in the Wild Is Not Always Faithful

https://arxiv.org/abs/2503.08679
4•florianherrengt•26m ago•1 comments

A decades-old bug in Knuth's long division (TAOCP Vol II, Algorithm 4.3.1D)

https://kolja.rs/algorithm-d/
104•nk_kolja•6d ago•21 comments

Cerebras CS-4

https://www.cerebras.ai/cs4
407•sunils34•16h ago•247 comments

Rings forged from meteorites may have been fashionable among ancient Greek elite

https://phys.org/news/2026-08-forged-meteorites-fashionable-ancient-greek.html
86•pseudolus•5d ago•35 comments

Being ambitious and being a dad

https://nicholascharriere.com/blog/being-ambitious-and-being-a-dad/
789•nichochar•3d ago•598 comments

Supersonic Trebuchet [video]

https://www.youtube.com/watch?v=Co57SfcT-h0
209•CharlesW•4d ago•92 comments

Mathematics in the Age of AI

https://arxiv.org/abs/2608.16753
7•jonbaer•1h ago•2 comments

Activation Energy is a good model for a lot of things

https://homosabiens.substack.com/p/activation-energy-is-a-good-model
117•surprisetalk•5d ago•32 comments

Show HN: Nikon F100 Film Camera Repair Notes

https://github.com/enthdegree/f100
25•enthdegree•4d ago•12 comments

New Casio F-B100W – Upgrade to the iconic F-91W after 40 years

https://www.casio.com/uk/watches/casio/product.F-B100W-1A/
74•__fst__•1h ago•60 comments

Palomar: A registry of Lean verified mathematics

https://terrytao.wordpress.com/2026/08/18/palomar-a-registry-of-lean-verified-mathematics/
155•matt_d•14h ago•37 comments

A 3D fruit fly on macOS desktop powered by the real FlyWire connectome

https://github.com/DenisSergeevitch/desktop-fly
355•phoenix120•18h ago•163 comments

How does IKEA come up with names for its products?

https://www.ikea.com/se/en/customer-service/knowledge/articles/6f564c4d-2ccc-46de-b643-545a3948dc...
427•NaOH•22h ago•304 comments

λλ: A Programming Language for Silicon Photonics

https://dl.acm.org/doi/10.1145/3789240.3829151
74•matt_d•10h ago•16 comments

Finger: the 1971 social network that never died

https://en.andros.dev/blog/54572bc7/finger-the-1971-social-network-that-never-died/
296•andros•1d ago•99 comments

A 25-year-old video patent just expired, ending a legal headache for Linux

https://www.xda-developers.com/25-year-old-brazilian-video-patent-expired-legal-headache-linux/
288•theanonymousone•4d ago•143 comments
Open in hackernews

New Casio F-B100W – Upgrade to the iconic F-91W after 40 years

https://www.casio.com/uk/watches/casio/product.F-B100W-1A/
74•__fst__•1h ago

Comments

d_silin•1h ago
Neat. Note that battery life is reasonably good (2 years) even with Bluetooth sync feature.
BeetleB•36m ago
I was about to ask that - I somehow doubt it will last 2 years if you keep the step counter + Bluetooth on.
davzie•31m ago
Bluetooth stays on only for three minutes and then turns itself off once you're done syncing stuff. I have had one for nearly two years now (ABL-100WE). Absolutely love it.
BeetleB•22m ago
OK, but what about the step counter. Can it really last 2 years with the step counter continuously on?
ndiddy•5m ago
I work with accelerometer chips, a lot of them have features specifically for pedometers. Keeping the accelerometer on will draw a few uA, then you can have the accelerometer keep track of the step count internally and have the main processor query it as necessary to update the step count display. When there's no motion for a while, you can also put it into a lower power sleep mode that doesn't track steps, then when it detects motion it'll wake up the main processor which will then put the accelerometer into pedometer mode. I think 2 years on a CR2016 (90 mAh) is reasonable if Casio knows what they're doing.
rickcarlino•32m ago
I was surprised to see it uses CR2016 batteries and still manages to get two years of advertised battery life.
pletnes•22m ago
Apple airtags last maybe a year on a CR2032, from experience.
PaulRobinson•30m ago
That's an amazing battery life these days. Love my Apple Watch, but having to charge it at least once a day, is a chore.

Might take another look at these - given the price, it's not a huge gamble to try it out for a few weeks.

avgDev•15m ago
I feel the same about the apple watch. All I use it for is literally tracking steps. I do not care about any other feature. If my watch fails I will just get a casio watch.
avipars•21m ago
Problem would be replacing it properly while maintaining it being waterproof.
BugsJustFindMe•18m ago
It's not waterproof, merely resistant.
cgyvbunji•1h ago
Not the first new F91W-ish model in 40 years but still neat, I hadn't heard about this one yet, thanks for sharing.
huntercaron•36m ago
Step counter seems like a bizarre thing to focus in on? are people passionately tracking steps without their phones?
davzie•34m ago
I am not passionate about it but I like to make sure I'm moving a lot. I like that I can at a glance just see how much that's happened each day. I have one of these. Had one a while now and its the only watch I've ever used that I've stuck with and kept using.
the__alchemist•31m ago
It's always been this way. It adds to the charm, to be realized in a few decades. Camp-chique.

Indiglo WATER RESIST 69m ALARM Chronograph

SyneRyder•31m ago
My father wears Casio watches almost exclusively, he's been tempted by a Fitbit so he can start tracking his step count, but even though I've bought him the Fitbit, he's finding the whole setup and app usage too intimidating, and so he hasn't used it.

This, in the silver ABL-100WE-2AEF model, is exactly what he wants. Same Casio, same interface, just now it has step count. He doesn't even need / want the Bluetooth.

(Me, I'll keep rocking my Pebble Time 2. Absolutely love it.)

bluGill•28m ago
My phone is sitting on my desk now connected to a charger - meaning any pacing I'm doing at the moment it not tracked. When I cook I often set my phone on the counter with the recipe - again while I'm moving all over. I often go to the bathroom in the middle of the night without bringing my phone.

I hate watches, but one would be better for step tracking - it is more likely to be on me to track information.

kylemaxwell•35m ago
I have two of these (wearing one right now!!) and several other cheap Casio watches. Some of my favorite purchases ever. I'm so in.
Markoff•34m ago
shame it doesn't have notifications, otherwise it would be perfect

so I guess I'm staying on my third Amazfit Bip since Pebble Time 2 has insane price

rtkwe•33m ago
It's still powered by a coin cell so it's probably for power conservation reasons. Way cheaper to periodically power on the BT radio and sync steps to your phone than it is to constantly listen for notifications.
Reubachi•18m ago
It's not just power, if it where, they'd fit a USB C rechargable cell in there.

Its still a cheap casio resin watch at the end of the day. If this where to be able to push/pull notifications, the watch would be completely different in cost, ui, marketing, etc.

It would go from being charming retro tech with modern features, to dime a dozen bloatware/fitness tracking hardware.

rtkwe•7m ago
I'd argue the coin cell and the power budget limitations that come with it are part and parcel of it's nature as a cheap casio resin watch.
caseyohara•21m ago
That's an interesting take. I wear a non-smart watch specifically because I don't want notifications or any smart features. I wore an Apple watch for years but went back to a dumb analog watch when I got tired of the distractions.
bradleyg_•32m ago
Does it fix the terrible backlight on the F-91W though..
jvandonsel•26m ago
The old Illuminator model has a much better backlight. https://www.amazon.com/Casio-F105W-1A-Illuminator-Sport-Watc...
Reubachi•20m ago
The G shocks have the same new abysmal backlight.

I bought one with a slick (new) dark red face....which lights up bright pink from the one white LED on the left side of the face.

Even in the marketing/landing page for this watch which is linked in post.....they show the backlight feature, looking like it's missing an LED.

eloeffler•18m ago
If it's the same movement as the ABL-100WE, I think it may.

The ABL-100WE has an orange light that stays on for either 1.5 or 3 seconds (configurable) and provides some decent light.

The display contrast doesn't seem to be quite as good as it used to be with older movements, though.

doe88•31m ago

  > Power supply and battery life
  > Approx. battery life: 2 years on CR2016
Not bad!
jorvi•31m ago
One thing I've never understood (and hopefully some Casio geek can shine a light on): why do almost all old Casio models have a 24/12h time switch taking the premium spot as one of the main 4 buttons, instead of having it buried deep in the (awkward) menus. Seems to me that something like alarm or stopwatch setting or a second menu action button would have been far more useful.
RoadieRoller•12m ago
In my country, 30-40 years back, people who needed a watch were those ones who travel regularly. And travel was mostly using public transport, trains and planes. Most or all of it operated using a 24h time. So it was very useful for them. That button was very useful. Compare that to the mute/silence/DND physical button in iPhones today.

Also people who worked in confined spaces who wouldn’t know if it was day or night outside after a days job. My father who worked in an oil rig in Abu Dhabi used one. He gifted me one.

This was 1998.

speak_plainly•5m ago
Those buttons are the menu. The idea of menus on watches is a modern ux extravagance.

I don’t have the satisfying answer as to why they dedicated a button to 12/24 hour time but my guess is that it’s simply a cool digital feature and stands out against the limitations of analog watches.

pjmlp•42s ago
To add to it, I always kept the manuals around, because remembering the key press sequences was akin to doing combos in arcade fighting games.

A few months without doing them, and it was hopeless trying to remember how to do them again.

Someone1234•28m ago
Here is a fun fact; the US believes owning and wearing an F-91W is evidence that you're a terrorist so much so that they can place you in Guantanamo Bay without trial[0]:

> In a handful of cases the detainee's possession of a Casio watch or the wearing olive-drab clothing is cited as evidence that the detainee is an enemy combatant. No basis is given to explain why such evidence makes the detainee an enemy combatant.

This is also noted on the F-91W's Wikipedia page:

https://en.wikipedia.org/wiki/Casio_F-91W#Usage_in_terrorism

[0] https://en.wikipedia.org/wiki/Seton_Hall_reports#Detainees'_...

kakacik•23m ago
I guess Toyota Hilux drivers are next in line with similar smart rules
echoangle•13m ago
The wording doesn’t seem to me like owning the watch was the only evidence and that was enough to put people in Guantanamo, it sounds to me like it was a contributing factor. Still a bit crazy but I don’t think they just arrested everyone with this watch.
naniel•25m ago
i don't want my casio to be smart. been rocking my mq-24 for a decade

doesn't mean others can't want a smart casio, but, it's not for me :D

suncemoje•24m ago
Nice move! I wish it would support even more activity / health features in the future like GPS tracking, sleep tracking, etc. As a full package in the classic design it would make a great alternative to Garmin / Polar / Whoop / Oura etc.
ncruces•22m ago
Right when I started building a custom F-91W with/for my kids based on sensor watch: https://github.com/joeycastillo/second-movement

I'll take some solace in mine supporting lots more alarms (beep when school recess ends) and a bunch of geeky stuff like sunrise, moon phases, tides, and stuff.

kazinator•22m ago
If you want a Casio watch and are traveling to Japan, just get one at a second hand shop there (WonderEx, Second Street, ...). They are tend to be well stocked on the Casio cruft.

I have a Casio PHYS STR-800, nonworking. I got it two decades ago because of the large lap memory (and unusual look, too); I was doing a lot of running, including track training and such.

It short circuited one day. Put in a battery, and it drained the thing in a minute. Put in another one, same thing.

It's been sitting in the top shelf of a bathroom cabinet since like 2011.

dingaling•22m ago
Like their G-Shock watches, the actual area dedicated to showing the time is overwhelmed by superfluous elements. Must be barely 20% of the top surface that actually performs its primary function.

When I look at my watch I want to see the time, not wasted space announcing "Casio Step Tracker" or "Water Resist" ( which isn't even proper English).

I moved to Timex a few years ago as their basic digital watches have nice big numerals for the time display.

eloeffler•20m ago
It seems to me that it's a slightly more affordable repackaging of the ABL-100WE. The features are the same, so is battery life.

That said, I really like this because the ABL-100WE comes with metal bands and I'd really like another watch with a rubber band :)

https://www.casio.com/de/watches/casio/vintage/product.ABL-1...

BugsJustFindMe•19m ago
How does it do step tracking with a 2 year battery life? A purely mechanical step tracker?
johnnyApplePRNG•18m ago
Why the hell is there bluetooth in it?!
suncemoje•17m ago
To sync activity tracking data with your phone
sparkling•17m ago
It's also a bump up in overall size. The OG F-91W wears very tiny on a larger wrist.

F-91W (old): 38.2 × 35.2 × 8.5 mm

F-B100W-1A (new): 41.9 × 38.1 × 8.8 mm

__fst__•17m ago
For anyone interested in modding the F-91W there's also The Ollee Watch, a replacement PCB which adds even more "smart" features.

https://www.olleewatch.com/

taviso•14m ago
I have one of these, there is an open source project called gshock_api that supports it. I think that makes it a much more interesting device. I don't use the app, I tag alarms in remind, and sync them from cron - works great.

https://github.com/izivkov/gshock_api

The full lifelog (what Casio calls the steps and other metrics) is an opaque binary blob, but we mostly understand it now, so you can access that too.

https://github.com/izivkov/gshock_api/pull/3

parl_match•9m ago
i love the product design aspect of a product that only needs to have one thing set (in this case, the time zone), to be eternally a functional device

which is why i love gshocks, both for design but also specifically the ones with tough solar/multiband 6 (and bluetooth (optional))

they have battery lives in the range of decades (due to solar charging), set themselves (multiband 6 is using atomic clock radio signals) and via bluetooth

you can get gw-b5600-2 and gw-s5600u (auto backlight) for under $200, but usually closer to $100. there are many more models, of course

that sounds expensive, but it's insanely durable construction and battery life means it'll be the only digital watch you'll ever need to buy. and the only configuration it will ever need is the time zone.

opengrass•4m ago
NOPE! No wirelesso in my watch, and there's no way you're getting 2 years on CR2016 when we compare stuff like AirTags.
_Donny•4m ago
I feel that the smartphone connectivity feature is a departure from the philosophy of the F-91W. Is having a smartphone for "Easy watch setting" not a flaw of the watch, rather than a feature?

I'd love if it was radio controlled and charged with solar. And without phone connectivity.

kakacik•21m ago
Step tracking is for health reasons. Unless you do activities you describe 12h a day, every day, whether they are counted or not doesnt move the proverbial health needle a bit
SoftTalker•15m ago
Step tracking is for people who like to pretend they are doing something healthy without actually exerting any dedicated effort.

"Walking briskly for 30 minutes" is a better measure of something healthy than how many steps you took.

branon•25m ago
People are, absolutely, yes! In the tech world there is an ever-growing focus on devices which can operate independently of smartphones, even to an offline/local-first extent.

The trend is trickling down into other circles as well. People are beginning to correctly identify needless hyperconverged connectivity as a burden rather than a convenience.

Reubachi•23m ago
Of all the things "smart watches" do, the one thing beyond time that most people actually perceive daily is their tracked steps.

IE; My apple watch ais the only one that goes out of it's way to make sure I know my steps for the day, and is always "accurate". Which is nice, but gimmicky for someone like me who doesn't analyze my steps.

I imagine Casio went after similar low hanging fruit, as an acceleromater is cheap/old tech, while still being able to feature compete with something like an apple watch.

suncemoje•15m ago
I guess it's a more complicated thing to implement (!= low hanging fruit), but I'd be more interested in sleep tracking than step tracking.
tjoff•10m ago
Sure, but we can't do sleep tracking well. Todays devices mostly guess and map to typical patterns. Might, might not, work reasonably for you. But chances are that if you want to track your sleep because you suspect irregularities then they are about as useful as a potato.
advisedwang•23m ago
I had this same reaction to past step counters. I keep my phone in my pocket, and it works basically perfectly as a step counter.

But then I realized that many people do not keep their phone in their pocket, especially women. For them, a watch, bracelet or ring really is the best option.

avgDev•16m ago
Not sure how old you are, but I am pushing 40. In order to stay healthy I need to track my steps and calories(somewhat), otherwise, I gain weight.

Tracking steps helps me stay on track.

jbjbjbjb•11m ago
Grandpa kept a pedometer in a little pouch for decades. I got him a Fitbit but he didn’t like that, and more recently another cheap pedometer off of Amazon.