ATTiny44 I2C Slave Feedback Module

On June 3, 2012   /   Development, Hardware, Software, Uncategorized   /   1 Comment
ATTiny44 I2C Slave Feedback Module

Some time ago, I made the decision to move all of the feedback elements of the prototype Keyglove design to a separate I2C-controlled module, instead of using direct I/O pin connections. I did this because I also added three new touch sensors and better Bluetooth link and mode detection, and I simply didn’t have enough I/O pins to satisfy everything at the same time. The I2C bus was already being used by other modules anyway, so adding an additional slave device didn’t reduce the number of available pins anywhere else. At the same time, I freed up five whole pins for other functionality (Red, Green, Blue, Vibe, and Piezo). Not bad.
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Actually, Here’s Keyglove Kit v0.4

On April 26, 2012   /   Development, Hardware, Uncategorized   /   2 Comments
Actually, Here’s Keyglove Kit v0.4

So, after extolling all of the electronic virtues of the v0.3 Kit PCB only a few days ago, I’ve gone ahead and created a new revision of the board already. It turns out that it can indeed be smaller, without sacrificing any of the existing functionality. In fact, v0.4 is a full 25% smaller even than v0.3, giving us a PCB that is now a mere 46% of the original v0.1 board’s size.
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Keyglove Kit Progress

On April 22, 2012   /   Development, Hardware, Uncategorized   /   1 Comment
Keyglove Kit Progress

Good news on the kit PCB! I think I’ve got a winning combination of size, layout, and functionality. I just posted Keyglove Update #17 on the Kickstarter project page yesterday which discusses some of what I’m going to explain here, but I’ll summarize that bit again for those of you who don’t follow those updates, and include a bit more technical detail here and there.
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WT12 Custom Breakout Board: Take 2

On June 25, 2011   /   Hardware, News, Uncategorized   /   20 Comments
WT12 Custom Breakout Board: Take 2

After my original post about the WT12 breakout board I was working on a while back, I thought I should really follow that up with some info on what’s happened with that adventure. In short, it’s been a great success! The PCB revisions that I made proved to work very well, and I now have two great boards available for purchase through InMojo, as well as an Eagle library if you want to make your own.
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