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Smart Jacket

As time permits I've been working on a wearable computing project.  The idea is to wire up a jacket with a simple communications network (and power!) such that small microcontrollers can be attached at various places.  Each microcontroller can be programmed for a small task (e.g., environmental sensing) and communicate with the others, forming a sort of re-configurable platform for testing out wearable applications.  I intend to use it as part of an upcoming Physical Computing course for a hands-on wearable computing unit.

  • four "hard points" where microcontrollers can be attached
  • i2c communication among all devices
  • Bluetooth communication with a smart phone or tablet
Currently using Arduino Minis for the application microcontrollers and a LilyPad Arduino as a "master" controller (currently, just the device for attaching the bluetooth modem).

Power and I2C Working

posted Nov 11, 2011, 10:01 AM by Lewis Baumstark

I've got a test program that blinks an LED on three Arduino Minis, over an I2C bus made out of FabricKit ribbon, in response to a signal from the LilyPad.  Not shown is that I have a power cable that connects to all devices and provides 4.5V from a 3-cell AA battery pack.  The system is now self-contained.

One snag is that I2C doesn't work unless three devices are connected, presumably due to termination issues on the bus.  Longer-term I'll probably need to put some termination resistors on the unused I2C ribbons.

I also need to label wires and polarity before I sic this on students.

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