I am so effing cool.
Goggles came!
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Category Archives: Watch
New features and replacement parts
I realized today that I2C is a universal(ish) standard kind of thing, and if possible, it would make it really easy if all of my components were I2C compatible.
For this reason, I’m probably going to replace my accelerometer with a a LIS-1331DLH, which is LGA16 like my current choice, but unfortunately, it’s .5mm pitch as opposed to .65mm, so I can’t use the same breakout board. I won’t worry about it right now and order it at some point in the future.
A Transplant Candidate
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:
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?
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.
Sockets and footprints
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
Idea and overview
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.