Has anyone around here used the arduino platform at all? (I know ENKI did, RIP).
It's a nice platform for rapid prototyping of A/D, sensors/actuators and controllers. I've played about with them for some fun applications.
I saw on Hackaday a proximity controlled motor used for blind navigation. What you have is a glove with two ultrasonic nodes on the front, and a motor strapped to your arm that vibrates as you approach something.
I want to adapt that to put it in clothing on my back. Eyes in the back of the head and all that, no one can take you by surprise.
The nice thing about this is a lot of sensors come prepackaged to give out data on the I2C line so a great many sensors are plug and play with it. If anyone has any ideas for potential uses for sensors I've got:
ultrasonic proximity, magnetometers, inertial measurement units, pressure mats, heart monitors, temperature sensors, RFID readers and tags, and various wireless nodes (Xbee).