A Transplant Candidate

Posted on September 5, 2010 by ch00f

So, I’m going to need a case for my watch to go into, so I ordered a cheap Casio watch off Amazon. Nobody seems to sell watch cases for hobbyists, so I guess I’m just going to have to go about ripping apart watches until I find one that will work.

This is the watch I bought:

http://www.amazon.com/gp/product/B000GAWSHM/ref=ox_ya_os_product

And I went ahead and bought a tool for getting the back off (I’ve done this before with a screw driver and managed to destroy my screwdriver, so…)

http://www.amazon.com/gp/product/B000HFRO8O/ref=ox_ya_os_product

Back to the drawing board already?

Posted on September 4, 2010 by ch00f

So I realized this morning that I’m not going to have quite enough I/O pins to drive all of these LEDs. If I set it up like this:

Then to get 132 LEDs (60 mins, 60 seconds, and 12 hours), I’ll need a 11×12 grid which will require 23 ports, much more than the ATmega48A has to offer.

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Sockets and footprints

Posted on September 4, 2010 by ch00f

I spent about 6 hours today racking my brain trying to find parts that will both do what I want and feasibly be used in both the prototype and final version.

My prototype will be on a breadboard, so I need a chip that I can surface mount to a breakout board and later surface mount to an actual custom circuit board.

Here’s what I got from digikey

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Idea and overview

Posted on September 4, 2010 by ch00f

I’ve made a few different time pieces since I started working on custom electronics and decided that I want to seriously “step up my game” by building something that is at the moment completely over my head.

I want to make a watch.

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