First Paper Fingerphone Prototype

On Top of Musical Greeting Card (for better sound projection)

Wearable Video Game Platform Bracelet

This bracelet has an Arduino-powered ring of white LED's with a 3-axis accelerometer tilt sensor.

How many interactions/games can you think of with this platform?

There are 3 in the video:

Hand in the air: flashes (because at a party you want to signal that you want someone to talk to?).

Horizontal hand: always illuminates the top LED's whatever rotation your arm has ("smart flashlight")

Spins of the wrist: a blob spins around in the same direction and slows to a stop.

For a commercially produced inertial-sensing band keep an eye out on getymyo

Sewn, wearable, etextile, fabric multitouch

Piezoresistive fabric is sandwiched by sewn rows of vertical and horizontal pads using a basic sewing machine's custom embroidery pattern.

Embroidered Wireless Ball Inclinometer

This wireless variant of Hannah Perner Wilson's fabric tilt sensor uses embroidereded high electrical resistance thread . I designed the tool path to create a resistive track from the patches that can be used as a potential divider . This results in a more continuous estimate of the ball location than is suggsted by the six apparently-discrete patches.

Arduino sketch for high frequency precision sine wave tone sound synthesis

This table-based digital audio oscillator implementation illustrates a few useful techniques on 8-bit microprocessors such as the Atmel parts supported by the Arduino/Wiring IDE. A timer is used to establish the sample rate clock and PWM is used to output an 8-bit signal. Human hearing has impressive frequency precision so accumulation is done on 32-bit integers. The code is a lesson in how to used fixed point representations and careful sizing of tables as powers of 2. This reduces the computational cost of the inner loop of the oscillator to a single 8-bit multiply, table lookup and
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