Problem: design a text entry device, including both hardware and software, to be able to input the lowercase alphabet and a space character. This design should not use more than 10 input switches
Design Solution: using chording of keys to output respective combinations, indicated in the enclosure design through color matching
For: Interactive Device Design, UC Berkeley Masters
Special Consideration: switch debouncing in code, ergonomic layout
Hardware Used: Redbear Duo
Chord Design
Switch Layout
Enclosure Design (laser cut file)
Prototype Enclosure
Final Product
Notes:
- Wire management was done using copper tape to concentrate all connections on one side
- Switches were then covered with keys for aesthetic purposes
- Prototype code includes a delay to account for user lag in pressing simultaneous keys
Diego Rivas 