./watch

313 pointsposted 16 hours ago
by shrx
(dotslashwatch.com)

84 Comments

blahgeek

14 hours ago

> taking inspiration from command-line interfaces

IMO the take away from command-line interfaces is compact, precise and minimal design. In a transitional shell prompt like #~$, each character has its meaning. Merely copying these symbols to a watch face is the exact opposite spirit of command like interfaces.

goncalomb

12 hours ago

Cool project, but I also noticed the weird choice of #:~$ as a prompt, it uses almost half the width of the clock screen. And isn't # normally used to denote root shells? I don't think I ever saw it together with $.

My favorite prompt is >: as a callback to the Swan computer in the TV show Lost (not sure if it's also used in early Apple computers).

dhosek

6 hours ago

If I remember right, > was the prompt for Integer basic, ] for Applesoft Basic and * for the monitor.

Angostura

4 hours ago

Yup.

3D0G to start basic from the Monitor

miohtama

11 hours ago

Good news it's an open source project so you can customise your prompt (:

dotancohen

10 minutes ago

Brought to you by the "it's configurable, so we don't need sane defaults" crowd.

OJFord

6 hours ago

`date +whatever` right arg for the output would also make more sense than `./t` if there's room

floppyd

12 hours ago

Great hardware design, awful watchface design. The pseudo terminal interface looks like something I'd design right after discovering Linux at 13yo and making it my whole identify for a while.

Rendello

7 hours ago

I don't understand everyone's harsh reactions. I too would've loved it at 13 during the same phase, so what?

The retro(-style) Casio community lives for retro-future kitsch. I guess it's a matter of taste.

ninalanyon

8 hours ago

> Great hardware design,

Really? It looks like it would be uncomfortable to wear with those screws on the back sitting proud of the surface. Why aren't they countersunk?

Or were you referring only to the electronics?

bigyabai

8 hours ago

It looks fine. The readout is digital and static, you know exactly where to read what you need. I doubt passersby are able to read what the screen says anyhow.

themafia

7 hours ago

> looks like something I'd design right after discovering Linux at 13yo and making it my whole identify for a while.

Was this sentence designed to make you look more mature and developed than this imagined 13 year old? It fails to do so.

stack_framer

6 hours ago

I couldn't disagree more. I laughed out loud at it!

  const sense = new Sense()
  sense.humor(true)

EarthIsHome

15 hours ago

If you like quartz watches that expose their circuitry, you'll definitely enjoy some of Accutron's watches: https://www.hodinkee.com/articles/introducing-accutron-314

While usually not on display, the quartz movements of Grand Seikos are beautifully finished:

* https://i.imgur.com/sJXfmg1.jpeg

* https://i.imgur.com/BucSW15.jpeg

* https://i.imgur.com/xVd04BM.jpeg

* https://i.imgur.com/wuRSif1.jpeg

Topfi

15 hours ago

Accutrons and tuning fork watches are amazing. They have an incredibly unique sound/hum due to the tuning fork oscillating at 360 hz and the most smooth glide you'll ever see in a watch. Recommend a ESA 9162 or ESA 9164 over a pure Accutron for beginners though, a bit more resilient and far more affordable, though they don't have the exposed dial.

briansm

13 hours ago

I believe this is why all modern digital watches use a 32768.0Hz crystal resonator, it's a power-of-2 frequency above the 20Khz top end of the range of human audio perception, to avoid the whole 'tinnitus on your wrist' thing.

namibj

8 hours ago

Also a tuning fork cut for a lower power-of-two would be a bit bulky for a compact wrist watch.

aidenn0

10 hours ago

I have an Accutron 214 and I swear it sounds higher pitched than 360Hz (sounds to my ear higher than A440, which I'm very familiar with). Maybe I'm hearing an overtone?

jsheard

13 hours ago

Interesting idea, but the generic green PCB is a bit of a missed opportunity. Some manufacturers now offer transparent solder masks which emphasize the copper traces and can look really cool with a clean PCB layout.

e.g. https://hackaday.io/project/194683-plasma-toroid-sky-guided-...

nitros

13 hours ago

It's also becoming possible to have transparent rigid PCBs as of quite recently: https://www.pcbway.com/blog/News/Transparent_Rigid_PCBs_Laun...

Naturally it does mean you can't have a ground pour, so the PCB needs to be designed to look nice with it.

llbbdd

8 hours ago

This sounds sick, I looked for a photo and couldn't find one that seemed to be this specifically, just lots of the flexible ones, do you know if there's a photo ref somewhere?

chias

8 hours ago

Worth noting that it's nine times the price (according to the link you posted)

iancmceachern

2 hours ago

Pcbs are super cheap, 9x $2 is still cheap

7373737373

14 hours ago

I learned the term for such mechanical watches is https://en.wikipedia.org/wiki/Skeleton_watch

jsheard

14 hours ago

I disagree with Wikipedia's definition covering any design where the guts are visible from either side, in my experience "skeleton" always refers specifically to the dial being hollowed out or transparent. When the dial is opaque but the rear is transparent it's usually called an "exhibition caseback" instead.

bashinator

8 hours ago

Agreed, and also most skeleton watches have the actual movement routed out to remove much of the material from bridges and plates, to expose as much gearing as possible.

Theodores

10 minutes ago

The most hardcore timepieces I ever had to use were the $50K+ clocks used in TV production galleries back in the olden days. These sent a time signal around the facility and there was usually a backup clock in a different part of the building, with both clocks talking to each other from the comfort of their respective 1U enclosures in 19" racks.

What I particularly liked was that these clocks did not actually tell you the time unless you hooked them up to your notebook's RS232 port and telneted in. We don't even have serial ports now, particularly on laptops, but I had to telnet into them to update them when the clocks changed to/from GMT/BST.

Up the road from these expensive clocks was a college that had a horology course. People on it would spend their three years making these absurd timepieces that were all about the mechanism and it was almost a point of pride for the students to have just an hour hand rather than something actually useful.

I feel that this watch concept needs a few more iterations to make it stylishly useless. For example, if the strap was like one of those ribbon cables we used to use to connect disk drives to the motherboard in early PCs, with an adaptor so the ribbon cable is either a watch strap, plugged into the watch, or a connector to a break out box that connects to a PC via USB, with this being the sole means of adjusting the watch or setting what mode it is in.

Regarding the screen and the terminal styling, this doesn't quite work for me as 'time' is what I type into the terminal to time something and 'date' is what I type in to get the date. I therefore see the terminal styling as a bit over the top. What I would like to see is an OG font from the 8 bit days, with blinking cursor, in old school LCD, think of the one character high screens that the last of the typewriters had.

Regarding changing the mode, some dip switches could come in handy. I think that there is fun to be had and that everyone would want to critique whatever gets made, as, ultimately, a CASIO is far better for the task in hand, plus you can also get calculator watches by them that get 90% of the aesthetic for a bargain price. But that is not the point though, much like the horology students, it is all about creating a timepiece and the challenges that involves, notably keeping the time accurate.

A for effort, and A for posting your work for armchair experts like me to critique!

incanus77

9 hours ago

Very impressive. I love this kind of project (by me or anyone else) — learning whole new areas of tooling that you're unfamiliar with, following a passion to make something that you can hold in your hand. Kudos.

codazoda

8 hours ago

Nice design.

I’ve been wanting a larger watch than most companies make. I’d like a traditional digital watch. Since I can’t find what I want, I’ve been thinking about building my own. I want to go to about 60mm for the case (across my wrist).

I purchased a Casio G-Shock GA-010 last week but its size is smaller than I anticipated. It’s 52mm.

I’ve also been drafting a document about how I’m using a digital watch to increase my productivity while limiting distractions.

jazzyjackson

10 hours ago

There's also the DIGIduino, an atmega128p design with segmented display. I like the variety of attempts and showing off the circuitboard like the complex movements of mechanical watches.

I do want to dig into how much a battery can be obviated here, there's one watch called the Pulse-o-matic that uses an automatic movement (that is, self-winding) to power an LCD display and associate 'tronics. I am charmed by the idea of wind up electronics now that we have microchips with deep sleep modes and ePaper displays that only need a blip to update.

https://theprintablewatch.com/collections/digital-watch-part...

https://www.hamiltonwatch.com/en-us/h52585339-pulsomatic.htm...

riazrizvi

12 hours ago

Very cute. If Casio bought you guys out and combined their retro design aesthetic, this would sell like hot cakes IMO.

mxuribe

12 hours ago

I'm not a watch enthusiast, but i do like the what i'll call old school look and appeal of Casio watches. If Casio hasn't already done so, it feels like they have chances to tap into both nostalgia audiences plus geeks audiences...and this watch - if they were to acquire it - would be awesome! Casio has its decades of manufacturing, distribution and marketing experience, and they get these novel, innovative ideas from others...and if they keep tapping into these geek topics, they could really be that niche maker for geeks - like what Apple products historically have been for creative types...sort of a default purchase for such an audience. (Again, i don't follow this stuff, so its possible they already do this.)

yohbho

9 hours ago

.\t

seems useful on it. can you run

watch -n '.\t'

on it? /jk as that would make it a dedicated watch watch

Rendello

7 hours ago

Maybe it updates every minute via a Cron job!

dvh

14 hours ago

Display HS096T01H13 almost fits inside F91-W (1mm too wide) but have much smaller bezel.

Neywiny

9 hours ago

The RTC doesn't seem much better than a 32k Crystal that the stm could use internally. Which is odd because there are better RTCs around. Maybe it's just for having the window to the crystal. And that's fair. Artistic choice

xrd

13 hours ago

I don't really get a sense from the repo and the very sparse readme how and at what cost I could build one of these. There isn't a pricing page so I'm assuming this is diy, build it yourself, right?

alpenbazi

15 hours ago

Interesting concept. Bigger screen less casing would be nice, but very good concept

ricardobeat

14 hours ago

It’s hard to achieve a good screen/case ratio in DIY projects. The screen components are bulky and it’s difficult to fit everything in small enclosures without producing custom boards, mass produced hardware has a ton of advantages there.

wkjagt

5 hours ago

It would be cool if someone made a mass produced "watch" that's all the hardware but none of the firmware. So a tiny computer on your wrist that doesn't do anything out of the box, and you can make it do whatever you want. Maybe a watch, maybe something else. It just provides the housing, microcontroller, battery, screen, etc., and an SDK.

tatjam

14 hours ago

Love how clever the logo is! I wonder why the RTC has the resonator exposed? I cannot find anything on the datasheet that explains its purpose

jsheard

13 hours ago

Maybe they laser-trim the embedded crystal in situ after the chip has been fully packaged? It might be more difficult to keep it in spec if they trim it earlier and then pass it through more manufacturing steps afterwards.

Arch-TK

12 hours ago

Seems unlikely it would fall out of spec by that much just during manufacturing. These things drift due to temperature (or even vibrations) anyway, and when it comes to using them in an RTC you have drift adjustment registers for any major drift from the factory.

Retr0id

11 hours ago

> The RV-2123 is an RTC with a glass top that allows you to see the quartz crystal itself inside the component.

Very cool

bogdan_r

14 hours ago

Looks awesome! What is the battery life? How much of the power is used by the screen?

tamimio

4 hours ago

I loved it all, software and hardware, thanks for sharing it!

> I had never done any PCB design before and downloaded KiCAD with no idea how it worked.

I saw similar lines among many people who designed great things, take a note, companies, just because an engineer doesn’t have 10y of experience in XYZ doesn’t mean they won’t do great in the job.

simonjgreen

14 hours ago

Swatch make some delightful and affordable skeleton watches

andrewrn

14 hours ago

Super awesome and fun project! I'm jealous

amelius

15 hours ago

Why isn't the silicon die visible? :)

projektfu

12 hours ago

Because light would affect its function.

amelius

12 hours ago

It's an interesting design-constraint though.

blankx32

14 hours ago

We need Ken Shirriff to build one

bogdan_r

14 hours ago

What is the battery life?

davydm

15 hours ago

Very cool. Keep on keepin on.

comrade1234

15 hours ago

Yeah the watch command is pretty sweet. sudo watch sensors

lloydatkinson

12 hours ago

The electronics section is a nice read but the software/firmware section is very barebones.

HelloUsername

14 hours ago

Change title to "STM32-based OLED digital watch"?

skrebbel

14 hours ago

What's wrong with the current title? It's a title, not a summary.

HelloUsername

10 hours ago

It was unclear for me at least. First I thought it's about a live folder/directory trick, then I thought a video streaming service. I didn't guess clock.

Y_Y

15 hours ago

On that point, I see an awful lot of code that uses dotslash as if it was necessary for files in the current directory.

You only need to prepend dotslash to a filename in order of disambiguate invocations of executables in the the current directory (and not a subdirectory).

This is because bare commands will be looked up in $PATH, rather than among executable files in $PWD.

It strikes me as weird copycat (without understanding) programming to just have it wherever you're referring to a local file. In fact I prefer to invoke `bash foo.sh` rather than `mv foo.sh foo; chmod +x foo.sh; ./foo.sh`. (This assumes that I don't need to rely on something special in the shebang line.) This also lets you use tab-completion as normal, as well as adding flags for bash like -x.

(I know you could use it for clarity when an argument could look like a string or a file, but I don't think that's usuaully the purpose.)

PhilippGille

14 hours ago

One issue is when the path is not interpreted by the shell but by a program which plays by different rules.

For example in Go:

  $ cd /path/to/go/repo
  $ go run cmd/myapp
  package cmd/myapp is not in std (/usr/local/go/src/cmd/myapp)
  
  $ go run ./cmd/myapp
  Hello, World!
And then people don't want to think about when your path is for the shell and when it's a CLI param and how the CLI treats it, and just use the version that always works.

Y_Y

13 hours ago

Thanks, this is the first good reason I've seen! Seems crazy to me that the go tool does that, but maybe I just lack sufficient unix-nature.

zahlman

13 hours ago

This allows it to disambiguate between system path syntax and the language's syntax for symbolic names.

Similarly, package installers can use this to disambiguate between "install the local file with this exact name" and "look up a file on the index for the named package".

catlifeonmars

8 hours ago

That’s because cmd/myapp is not a local path, it’s a universal path. It makes more sense when you type go run github.com/user/name/cmd/myapp

umanwizard

9 hours ago

This is one of the papercuts of go that I find way more annoying than is rational.

Bleibeidl

15 hours ago

I'm pretty sure most people use it to make clear it's a relative path. It takes mental load off the one reading the code. That's why I pretty much always use it, not only when executing things.

aidos

15 hours ago

./<tab> completes nicely. Ambiguity is removed. There’s no chance of accidentally running the wrong executable.

So I think you and I differ on this one, but none of this is a hill I care to die on.

lynx97

15 hours ago

For executables, it is actually necessary to prepend ./ iff . is not in $PATH. And . is usually not in $PATH for security reasons.

mjw1007

15 hours ago

It makes tab completion work.

jagged-chisel

15 hours ago

At the start of a line? So you want to run a script or executable in the current directory. PATH doesn’t contain . and ./ is necessary.

As an argument in a line? My shell offers completion from the current directory without ./ just fine.

alganet

2 hours ago

Let's say you have 100 programs in your PATH that start with the letter "g", but only one program in the current folder that starts with "g". You type `./g[TAB]` so it autocompletes automatically to the local program instead of cycling through dozens of results you know you don't want.

amonith

15 hours ago

I use it for autocomplete... e.g ./f<tab> and enter. If I don't do it the terminal literally hangs for a split second and gives me a lot useless suggestions. I rarely type full words.

teddyh

15 hours ago

Similarly, many people needlessly append a slash to every directory name.

SoftTalker

8 hours ago

Makes it clear you're naming a directory and not a file.

I also alias 'ls' to 'ls -F' so that directories have a / appended, makes it easier to understand the output.

chuckadams

8 hours ago

It's handy when the directory might not exist, happens all the time in git checkouts. Raise your hand if you've ever moved something to tmp and created a file called tmp.

Usually it's tab-complete adding the slash though, I don't go typing it in.