Final Prototype (Yeah, right)

Here is the assembled watch in it's case.

Note, I changed the watch face from the previous prototypes. You know why? Because I can!! I love having a watch that is totally customizable.

This current version is different from the last because, instead of using an IMU board with the 3.3V power supply and the sensors, I have used discrete components. This has reduced the thickness to be able to mount the whole project in the iPod nano case. Well, almost. The battery is sitting on the outside of the case but adds so little to the width it is nearly undetectable. Here is the new assembled board:

The small square to the right of the ATMega1284p is the LSM9DS0 IMU chip and just to the right of that (the small silver looking square) is the BMP180 Pressure sensor. Note that I had to take part of the case off of the piezo speaker (large square on top of board) so that it would have the clearence needed to slide the case over it.

Here is the case going on:

Next, I position the battery and tape it down:

That is it. Place the band on and you are good to go.

Notice the profile. The battery is almost invisible.

That is it. You have an assembled watch. I will be posting a video soon. I have a couple of the blank pc boards for this project, so I may make them available to anyone looking to take on this project. All components come from Mouser and I will post the parts list when I post the updated schematic and layout files.

If you like this project, please like the post and share it with your friends. And don't forget to vote for it in the Atmel Simply AVR design contest!!! Thanks so much!!

I posted an updated video of the prototype watch. Go see it in action.

Final look

Here is a picture of what I am going for. This is my first prototype (with the sensor board removed) in the Apple Ipod Nano Aluminum Watch Band.

Really pretty. But here is the thing. It is tight in that case. The Ipod Nano 6th gen is tiny!!! I have the battery for it next to the watch in the picture and you can see that it takes up half the volume of the compartment. To make this all fit and still make it so it can be a hobbyist project may be a little much. The piezo speaker I got in from Mouser is only 3mm tall and is way too big for the housing. It will also be tough for the battery to slip in on top of components mounted on the board. I have a couple of options. I can make the watch a little thicker and stay with the rubber case which is pretty forgiving, I can strip the watch down a bit to fit in the nice rugged case, or I could try to fabricate a custom case for it. I am leaning toward the rugged case. I think the next watch will probably be a redesign using a Sharp Memory Display and a dedicated power management chip. I may also go with an ARM processor. I will update as this unfolds.