08/21/2014 at 03:41 •
I have started the PCB design work. WIth the schematic out of the way I hope to have the PCB completed fairly soon (though since I have no idea what I'm doing, it could take a bit). Next steps until completion:
* PCB designed and printed
* Solder all the things!
* design and print case.
08/21/2014 at 03:35 •
When I started this project, I did not know how to surface mount solder. This greatly limited the form factor of the watch itself. The only way I could think of mounting a 40 pin MC was to do something like this:
Now however that I know how to surface mount solder, and parallax makes the propeller as a QFP (
http://www.parallax.com/product/p8x32a-q44), this is no longer a limitation. The current plans are as follows:
I do like the look of the leather band, so I decieded to keep it. The watch may be a little thicker than I'd like, but I think I will be able to fit everything inside the case once its completed. I also hope to get a circuit pattern etched into the band with a leather burning tool once the project is complete.
08/21/2014 at 02:46 •
One of the first things I realized when building this project was that a solid case would need to be created to protect my new watch. I had two options I could think of:
* learn carpentry and make a wood case
* Hire a blacksmith to forge a case.
Over time I had gotten more interested in 3D printing. I realized that not only could I create a case for this project if I purchased a print, but create parts for every project I would ever do down the road. With this in mind, I purchased a Replicator 2.
In learning how to use the printer, I've made all sorts of things (but that is another topic). The next step as far the case is concerned to learn how to make my own 3D objects. I can make basic things in sketchup, but I want to make something that looks good. So I got this:
Once I have an idea what the PCB will look like, I can start with this.
08/21/2014 at 02:33 •
Finally finshed the project schematic tonight. Added parts are the 5-way directional switch (for menu navigation) and the eeprom (these parts were not present on the image posted before). Next step, creating the PCB. This is my first time with Eagle cad, so this may end up taking multiple revsions to get right.