Final project for Interactive Device Design
Professor Björn Hartmann
Production Period: seven weeks
Motivation:
In response to a recent power outage and explosion on the UC Berkeley campus, we wanted to develop a low cost device for peer to peer communication that can function independently of external power and communication networks. The existing text-based campus warning system was highly ineffective - it was delayed and when it did appear, it lacked in details.
Solution Overview:
In the absence of external power and communication, we want to empower the general public to spread relevant information instead of fully relying on centralized authorities. The device contains a microcontroller, wireless transceiver, and simple inputs and outputs: leds/buttons/switches/piezo.
In addition, the device's basic I/Os can be augmented by a smartphone through communication through the standard TRRS audio jack.
Team Members: Alvin Yuan, Lanssie Ma
My Responsibilities: Electrical and mechanical design of entire device, some microcontroller programming.
Poster
![aperture](images/networkDiagram.png)
High level view of our network diagram. The range of the hand-held devices are complemented by 'base-stations' which have greater broadcasting range.
Drawing credit to Lanssie Ma.
Short video demoing wireless communication through the device, as well as communication through the audio jack
![P1020739](http://farm6.staticflickr.com/5514/11314691156_e6fca36ed9.jpg)
Circuit board in initial stages of assembly.
![P1020821](http://farm3.staticflickr.com/2871/11314692646_cd32827024.jpg)
Sanity check. Testing the inputs and outputs. Buzzers/buttons/leds.
![Fullscreen capture 12142013 24442 AM.bmp](http://farm4.staticflickr.com/3765/11365099006_7fae4a6190.jpg)