Building touch sensors from digital barometer chips

August 30, 2012 By 16 Comments

A couple of Harvard researchers have developed a method of using digital barometers as a touch sensor. The good news for us is that they’ve open sourced the project, including Eagle board files, firmware, and details about the materials they used.

The digital barometers were chosen for their characteristics, availability, and low-cost. The sensor uses an array of Freescale … Read the rest

Filed Under: Microcontrollers Tagged With: , , , ,

1-wire barometer

July 22, 2008 By 4 Comments


[David] put together this rather nice 1-wire barometer. An MPX4115 measures the pressure while an SMD DS2438 mounted to an 8 pin DIP socket provides the 1-wire interface. The writeup includes a nice description of the board layout and wiring, making this project accessible to just about anyone with a decent tip on their soldering iron.… Read the rest

Filed Under: classic hacks, misc hacks Tagged With: ,