I designed this board to monitor the power system in Intel Labs Seattle’s
mobile robotics platform. It provides four current and four voltage
measurements, and interfaces with a PC via USB. Readings for all of the
channels can be read at over 100 Hz.
In the autumn of 2004, I moved to Seattle to attend the University of
Washington. I began taking photos to share some of the neat places I discovered
while exploring the areas around campus with my family and friends back at
home. I started with a pocket-sized point-and-shoot digital camera, back when
they were starting to become popular. As I learned more about the art and
science of photography, I’ve moved on to cameras and lenses that afford better
manual control.
I still enjoy taking walks around the beautiful University of Washington campus
on weekends and capturing some of the scenery.
For the Winter 2009 offering of the University of Washington CSE Software for
Embedded Systems course, I designed a laboratory assignment around electric
field sensing. In the lab, students used an 8-bit microcontroller to accomplish
the following:
generate a waveform at a specific frequency to drive a resonant transmitter
synchronously sample a received signal with an analog/digital converter
demodulate the received signal in software to recover the signal magnitude
use pulse-width modulation to drive an RGB LED, varying its color with the sensed distance between the sensor and the user’s hand