This week we worked on making our sensors and our pulling mechanism (figuring out how to make it contract). This involved a lot of experimentation and prototyping.
Last week, we talked about using "roach" sensors. These proved to be too delicate. Another problem was that each was it's own circuit. We decided a more elegant solution would be to have one circuit for the entire perimeter of the umbrella. When the edge of the umbrella is bumped, the circuit is completed and the umbrella will contract.
To make this "circuit" we put aluminum foil on two sheets of fabric spaced by felt. This is better demonstrated in the video and images below:
This is the general idea of how our umbrella will contract: (yes, I look very proud)
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