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Santa Clara Adult Education

Switch Master 3000 Assistive Technology Switch (ENGR 110, Spring 2011)

Students: Orianna Hilliard, Mendel Hung, Lauren Jauregui

Advisor: Shoba Krishnan

Students developed a motion sensor to use as a ‘selector’ to assist a client make selections on a computer monitor for help with daily tasks and needs.   The client has cognitive skills, but is unable to communicate physically, so she uses the screen to select what she wants to communicate. Several other sensors had been tried and were rejected by the client because they were restrictive or lacked accuracy.  Students used a PIR motion sensor as the main component, and incorporated an inverter, a 555 timer, and a 1/8 inch standard jack connection. They added a battery and put everything inside a plastic box to keep it from breaking if it were to fall.