Allex Bigelow Akb712

Allex Bigelow akb712 Robert Bushman rlb270 Marie Denis mad462

EE 331 Project Proposal

Project Description We will design a key finder that will detect a signal and output a sound as well as causing a light to blink so that the keys can be found. There are multiple ways we could do this. We would like to make a design that would be able to have voice detection to turn on the finder. If this proves to be too difficult we will look into using a clapping system where the system measures the time between claps to turn on, or possibly a frequency detector in order to turn on the finder.

Type MCU The MCU that we decided to use is the PIC16F84A because we are most familiar with the way this chip functions, and from what we have researched so far it should be capable of driving our design.

Design Challenges Some of the design challenges that we will face are:  Learning the basics of programming a microcontroller.  Detecting a clap, and not background noise.  Having a range for the two claps.  Analog to digital conversion for clap sensor.  Programming of different sounds, so the sound output is not a generic frequency (a specific tune to know for sure its your keys)

Group Names and tentative roles We broke up our design into 3 main components: main programming of the MCU, the circuitry for running the finders speaker and led, and the analog to digital conversion circuit. We will all take part in each of the different components of the design, but each part will have a leader for the design. The section leaders are as follows: Allex Bigelow – circuitry for running speaker and led. Robert Bushman – Programming MCU Marie Denis – Analog to Digital conversion