Introduction

Statement of Purpose

On any college campus, theft of valuables such as phones, laptops, skateboards, or even bikes is an issue that calls for security measures that are mobile enough for the average busy college student. Our goal is to create a different kind of security, one that can easily be used in lecture halls and libraries to prevent immediate theft of items close by. Our idea is a simple device that, when armed, emits an alarm sound upon detection of any motion. This device could be attached to skateboards to prevent them being stolen in the middle of a lecture or placed on a laptop to prevent theft in a work-study area such as a library. On a small scale, where the user (or any bystander) within earshot of the alarm could be alerted to the attempted thievery.

Design Details

Block Diagram / Flow Chart

System Overview

Using Arduino prototyping software, we intend to work these elements in to two systems - the trigger, and the lock itself. The trigger will use Bluetooth to communicate with the lock. The lock will need to have a power supply, accelerometer, wireless receiver, and speaker. The lock (and trigger) will be housed in small, 3D-printed containers designed to be attached or set on various surfaces and objects.

Parts

PCB 8OHM SPEAKER

DUAL AA BATTERY HOLDER

ARDUINO UNO

Accelerometers

Wireless (Bluetooth) Transmission and Reciever

Possible Challenges

The largest challenge we're expecting is working with the wireless Bluetooth communication between the trigger, and the lock. Not only do we need to establish a connection, we intend to use a hash function with a corresponding key to ensure security against hackers who know about the software and intend to disable the lock.

Another challenge will be setting up the Arduino system and calibrating the accelerometer within the lock itself, however right now we do not foresee too much trouble.

References

Help from leaders in the Honors Lab

ECE 110/120 Honors Lab Section : Fitlock