chebe: (StarryNight)
[personal profile] chebe
If you follow me on twitter you may have noticed that I have been playing with getting the maximum number of LEDs for the minimum amount of microcontroller that I can. Here's a short summary.

First came the Flora with SewIO16. Straight forward enough. Just required a fair few crocodile leads.

Flora connected to SewIO16 and 16 LEDs with many crocodile leads

Flora and SewIO16
Photo by chebe



Then I swapped the Flora out for the Gemma. The Gemma needs external pull-up resistors (5-10k) on the Data (D0) and the Clock (D2) lines. Oh, and a special I2C library is required! But otherwise, same code as for the Flora.

Gemma (with pull-up resistors) connected to SewIO16 and 8 LEDs with many crocodile leads

Gemma and SewIO16
Photo by chebe



But then I swapped the SewIO16 out for SewIO8s. Cue moar crocodile leads!

Gemma (with pull-up resistors) connected to two SewIO8 and 16 LEDs, with many, many crocodile leads

Gemma and two SewIO8s
Photo by chebe



So far both SewIO8 boards are playing the same light sequence. My next task is figuring out how to get them to act independently. And then, to add SewIO16s into the mix as well, for nearly unlimited LED blinkiness!

Here's a short video clip of this twisted setup in action.




Video of Gemma and two SewIO8 boards doing the blinky
Video by chebe




I have to thank Rob for being very patient in answering all my questions. And also to note that although I'm using the Adafruit wearables, Rob has been using the LilyPad boards (including the Tiny!) with the SewIOs quite successfully. Yay for interoperability! And finally, that they don't have to be regular LEDs, you can connect anything you could normally. I think RGB pixels, and smile.
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