[mod] Casio F-91W Sensor Watch

I just recently received my Sensor Watch pcb that I ordered from crowdsupply a little while back. The pcb is a drop in replacement for the Casio F91-W wrist watch that provides GPIO expansion for sensors and a Cortex M0+ processor for custom firmware. After installing it in my F-91W I take a quick look at it and give my thoughts.

The project can be found here:

The Sensor Watch software Wiki:

[Shawn_White]

RGB backlight. Still only illuminates 1/8'th of the display

[derjansan]

This was pleasant to watch. During lockdown I modified some f-91w with my children to invert the lcd display, change the led and add an nfc tag. Really nice projects, and mistakes are not too expensive.

[quarteratom]

I don't care for sensors, but I want a programmable digital watch that drives a nice segmented LCD display. "Digital" "smart" watches are really scarce, and they always steal your data, and have bad software.
It would be also nice if they made a custom PCB for bigger Casios, like calculator or databank watches, and added some kind of radio, Bluetooth, Wifi, or other computer interface, USB, Datalink or something.

[Trippsy]

I would have never known about this otherwise. I want this now...

[ShaneGadsby]

1:35 the PCB has what looks to be USB micro as a bare edge connectors- I'd wager you just plug a USB micro cable onto those and it'd enumerate as a USB device.

[CasioDigitalFan]

Why would you use metal tweezers to hold the battery like that. You’re connecting the positive and negative and shorting the battery. You can buy plastic tweezers.

[fradd]

Interesting. I have to check if pcb plate is compatible with my A163w. Although that would be just for the sake of experimenting, i dont really miss any feature on my watch.

There must be a smart version of f91w.

[budsyremo]

I got a Casio gbd 200 . I miss the hourly chime in it so I wanted to ask that what do I need to do to install / hack an hourly chime to it .

[Lil-Britches]

What the hell is this depressing suicidal music?

[yerkodiegoborjakvessitchva]

HEY MISTER OBSO, AMAZING THIS NEW FUNCTION SENSOR WATCH INSTALLED IN MODEL CASIO F91 . FANTASTIC RESULT . WELL DONE ! .
MAYBE I SHOULD IN MY CASIO F - 91 PROVE IT .
GRETTINS FROM FRIENDSHIP . 🖐️😊😉👍

[arslemegeton]

It's posible to put a metronome / pacer feature?

[Damon]

Non capisco come acquistarlo ma vorrei acquistarlo con il meteo temperatura