Date of Award


Document Type

Open Access

Degree Name

Bachelor of Science


Electrical Engineering

First Advisor

Shane Cotter




fingerprint, locks, lockers, security, scanner, display, prototype


The purpose of this capstone project was to design, construct, and test a biometric fingerprint locking system to control access to a set of lockers. This system offers a convenient alternative to traditional locks and makes lockers easier to use. Traditional locks require some type of prior knowledge, like remembering the numbers and how to enter them for a combination lock. This can make it difficult and annoying to try and use a simple locker. Three main considerations were kept in mind during the design process to make this system more convenient than traditional locks: user friendliness, accuracy of identification, and false positive rate. The most important aspect of this project was to make a user friendly system, without challenges and questions. It was also vital to have a high identification rate while the false positive rate should be kept to a minimum, as people should not be “accidentally” granted access to other’s lockers. To solve this problem, the project was based around a fingerprint scanner which was controlled by a microcontroller. The microcontroller was the brain of the system. It sends instructions to the fingerprint scanner, interprets returned data, and controls a LCD display so that the system was more user friendly. This report will discuss the background information needed to comprehend a fingerprint identification system, a detailed explanation of the design requirements, the design alternatives along with why components were selected, the preliminary proposed design, and the design of the final prototype.