This was part of my 2nd year module Embedded Systems Project at the University of Leeds.
The objective of this project was to develop a breathalyser device based on a programmable microcontroller chip (ATMega328). This development also included design and manufacture of a unique Printed Circuit Board, and the fabrication of an enclosure for the whole system cut from acrylic glass material. The breathalyser system was developed to include additional features that improve the overall experience and provide a simple and user-friendly interface. The device was successfully assembled and completed to deliver a fully working prototype. I found this to be a particularly valuable exercise in acquring insight into embedded systems development.
Complete block diagram of the system
SolidWorks model of the Breathalyser Design
Printed Circuit Board that was designed in EagleCAD