The inspiration for this project was the University of Sussex's work in the field of advanced ECG sensors.
What it does
It's a electrooculograph built from a few cheap electronic components and an Arduino—it tracks eye movement by measuring the potential difference between the cornea and the retina.
How we built it
A the potential difference between a pair of electrodes is amplified by an instrumentation amplifier, then passed through a couple of simple filters. An Arduino then reads this signal and performs some further processing, before sending the value over serial to the computer.
Challenges we ran into
The original circuit was far too complex, and difficult to debug. In the end, we pushed a lot of filtering into software, and it seems to have paid off.
What's next for EyeCaptain
Whilst EyeCaptain itself is just a proof of concept, it demonstrates that devices such as EOGs are actually very simple in design, and can be used to provide hardware accessibility to seriously disabled people.