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Data Runner Watch Prototype – Modded Casio F91W

n-o-d-e.net

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Re: Data Runner Watch Prototype – Modded Casio F91W

#31

Post by jasona99 »

kruffin wrote: post #18
jasona99 wrote: post #15

Does anyone know what NFC transponder they might be using? I might have filtered too much on Mouser and missed it, but I'm struggling to find an 8KB module with that case. I also can't find it on the site since there's no BOM.

Freeze the video at 1:47 and you'll see K352 4SDYU from STMicroelectronics. Dug a little and came up with M24SR16-YDW6T/2 which can be found in DigiKey here: https://www.digikey.com/products/en?keywords=M24SR16-YDW6T%2... That one is only a 2Kb though. They also make an 8Kb 4SFYU: https://www.digikey.com/products/en?keywords=M24SR64-YDW6T%2...

Goodness, I'm blind, completely missed that shot. Thanks!

Re: Data Runner Watch Prototype – Modded Casio F91W

#32

Post by rcar »

nimbius wrote: post #26

I used to buy F91W watches all the time. they were fun and practical, but wasteful. the most shameful fact about the F91W isnt its spartan design or its affordable price, but the fact that the timepiece with its ten year battery will easily outlast its resin strap, and its springbars are nothing more than pot steel held into the soft plastic lugs by friction alone. Chances are, when you replace the band after a few y…

I was curious about what "pot steel" was - for anyone else who hadn't encountered it before: https://en.wikipedia.org/wiki/Pot_metal

Re: Data Runner Watch Prototype – Modded Casio F91W

#33

Post by onli »

Abishek_Muthian wrote: post #30
core_dumped wrote: post #29

Earlier quoted context omitted.

I found N-O-D-E a few years ago when I was just starting to get into programming. Their early raspberry pi gadgets were so cool and encouraged me to go out and try to make my own stuff. On top of that their channel used to do semi regular tech news updates, and after a bit of a hiatus it appears as though they're posting again which is exciting.

I assume their videos got buried by the YouTube algorithms now as it doesn't conform to typical tech (read marketing) videos shot with RED cameras and Robots rigs.

I got that datarunner F91W video recommended by the Youtube algorithm. So they are not completely buried.

Re: Data Runner Watch Prototype – Modded Casio F91W

#34

Post by awiesenhofer »

kruffin wrote: post #18
jasona99 wrote: post #15

Does anyone know what NFC transponder they might be using? I might have filtered too much on Mouser and missed it, but I'm struggling to find an 8KB module with that case. I also can't find it on the site since there's no BOM.

Freeze the video at 1:47 and you'll see K352 4SDYU from STMicroelectronics. Dug a little and came up with M24SR16-YDW6T/2 which can be found in DigiKey here: https://www.digikey.com/products/en?keywords=M24SR16-YDW6T%2... That one is only a 2Kb though. They also make an 8Kb 4SFYU: https://www.digikey.com/products/en?keywords=M24SR64-YDW6T%2...

I am pretty clueless when it comes to NFC, does adding such a chip mean i could copy my Mifare Classic card onto the watch? That would be neat!

Re: Data Runner Watch Prototype – Modded Casio F91W

#35

Post by motohagiography »

Bought one in silver. As a massive product play, making this and other retro era watches into a fido authenticator would be the use case functionality that would make it huge.

I was going to do an Atari 2600 case based wifi router a while ago, and this idea of taking design classics and adapting them to minimalist modern use cases would be a company.

Re: Data Runner Watch Prototype – Modded Casio F91W

#36

Post by cculpepper »

JackMcMack wrote: post #13
hwj wrote: post #2

Here's another F-91W mod: https://github.com/carrotIndustries/pluto

I built one of these, modified the firmware to show leap seconds: https://www.youtube.com/watch?v=tQaPtOPP09U

I ended up making an "app" to do hundredths of seconds for TSD rallies. Awesome project. My build is 2-4 years old (IIRC), so it has some power issues, sometimes I'll catch it waking itself up more than usual, and I can hear the wakeups in the piezo which doesn't help.

Re: Data Runner Watch Prototype – Modded Casio F91W

#37

Post by Nextgrid »

Erazal wrote: post #25
lippel82 wrote: post #23

Earlier quoted context omitted.

It says: "Be aware, this particular NFC chip is NOT compatible with tap-to-pay."

hum... That's sad. It's almost there ! Does tap-to-pay require specific maker certificates ?

Tap to pay requires you to extract the certificates & private keys of a real card. You can write (or license) an EMV applet for any JavaCard or similar smartcard that allows you to run arbitrary code, but without the keys associated with a valid payment card it won't do anything.

Re: Data Runner Watch Prototype – Modded Casio F91W

#38

Post by plants »

nimbius wrote: post #26

I used to buy F91W watches all the time. they were fun and practical, but wasteful. the most shameful fact about the F91W isnt its spartan design or its affordable price, but the fact that the timepiece with its ten year battery will easily outlast its resin strap, and its springbars are nothing more than pot steel held into the soft plastic lugs by friction alone. Chances are, when you replace the band after a few y…

This is hilarious, I realized the exact same thing about the F-91w after wearing them for 3 or 4 years. Another alternative is the Casio F-84w, which is almost completely identical to the F-91w. It's slightly more expensive, but the default strap has small circular rather than wide ovular notches. This seems to have completely fixed the strap weakening/breaking problem. I have only had it for about a year, but it shows no signs of letting up anytime soon.

Re: Data Runner Watch Prototype – Modded Casio F91W

#39

Post by johnnycab »

codezero wrote: post #22
Erazal wrote: post #21

Wow I'm amazed by the option of adding a chip from a tap to pay card. This would be a lot better than an NFC chip on a standard smartwatch as the F91W could last for years with that chip inside it. The F91W is cheap, and really reliable. I've always fantasized about modding one, and this exactly would be my dream. Sadly, I don't have enough time on my hands. If it were for sale, I'd buy it immediately !

Your wish is almost granted: https://n-o-d-e.shop The link is at the bottom of the site, but it's pretty subtle, and I think these watches have the same mods. Edit: These have NFC, but no SD card, so maybe they will show up with enhanced storage later, but anyone wanting the NFC features with the watch it looks like they are available. Edit Edit: The NFC chip in the ones for sale is not tap-to-pay :( still neat thoug…

It is possible to scavenge the NFC antenna/chip from an Oyster card or indeed any other card, which the author alludes to in their video. There are details floating around on how to do it, by dissolving the card in acetone.

However, the relevant authorities might take a dim view of repurposing the transit card in this manner and probably have certain restrictions in place, to deter people from defacing their property. On another note, the author is using a NTAG213 on the watches sold via the shop and Oyster is Mifare, from what I can remember. There might be issues with response times regarding the proximity to the reader, if you wanted to experiment.

Re: Data Runner Watch Prototype – Modded Casio F91W

#40

Post by plutonic »

rcar wrote: post #32
nimbius wrote: post #26

I used to buy F91W watches all the time. they were fun and practical, but wasteful. the most shameful fact about the F91W isnt its spartan design or its affordable price, but the fact that the timepiece with its ten year battery will easily outlast its resin strap, and its springbars are nothing more than pot steel held into the soft plastic lugs by friction alone. Chances are, when you replace the band after a few y…

I was curious about what "pot steel" was - for anyone else who hadn't encountered it before: https://en.wikipedia.org/wiki/Pot_metal

It’s nice to know all those Casio watches I’ve been wearing for years and years probably have lead exposed on them :/
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