Group 2A: Speed gun

Abstract

This document describes the research, design, and testing of the speed gun designed by Group 2A for the School of ECEN 4024 Capstone Design class of spring 2017. The project was assigned at the beginning of the semester to be turned in after demonstrating its functionality at the end of the semester. The purpose of this project was to demonstrate the skills obtained through the School of Electrical and Computer Engineering curriculum in one project covering many areas of electrical and computer engineering. The specifications are set by the group, and the end design must match these specifications. In this report, the responsibility breakdown, budget and schedule, background information and research, methodology, detailed design, and end results are all described.

The group was allotted $250 by the School of Electrical and Computer Engineering department to design and build a functional project. Group 2A broke apart the workload based on skills and comfortability working with certain areas of the overall system. These sections included RF circuitry for Roy, electronics circuitry for Tyler, software development for Matheus, and packaging design for Andrew. Each member performed their share of the work as well as contributed to the other sections as needed. After researching the respective sections, the group came together to design an overall system to perform at the specified goals. After many challenges, hard work, and collaboration, the group was able to complete the project ahead of schedule and reach some of the stretch goals for the project including a PCB design, BLE implementation, and multimode operation. The device met the specifications, successfully measuring the speed of a baseball. In normal operation, the speed gun does not exceed a total current draw of 120mA, consuming 600mW. The group stayed well under budget coming in at a grand total of $162.64.