DMX repeater

Grading:

1. Scope -- Excellent; combines both hardware and software.
2. Functionality -- Excellent; works per the spec.
3. Hardware complexity - Good; an external RS482 transeiver.
4. Software complexity - Excellent; interrupt-driven, state-machine implenetation.
5. Presentation - Excellent.
6. Practicality / usefulness / fun factor - Excellent.