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What I’ve Done

Projects

 
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3D Printed Prosthetic Skiing Leg

September 2016 - May 2017

This 3D printed prosthetic skiing leg was a year-long, collaborative project completed during my senior year at Merrimack College.  This project won first place for Outstanding Senior Design Project.


Objectives

  • Design a product with a team utilizing all the skills acquired during  our undergraduate engineering education

  • Execute engineering ethics while producing a product that falls within reasonable constraints

  • Display evidence of consideration of design aspects including effectiveness, material selection, safety, cost, environmental effects, ethics, production, etc.

Design specifications

  • Suitable for a beginner skier with a height of 5'10" and weight of approximately 200 pounds

  • Cost efficient

  • Lightweight yet as strong as possible

Athletic prosthesis for above the knee applications can cost over $70,000. By creating a new design of a prosthesis that would be 3D printed, we are able to substantially reduce this cost. For the prototype we researched how total knee replacements function, as this would best replicate the movement  of a knee for our design.

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Backpacker
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Skee Ball Machine

December 2016


The Skee Ball Machine was a collaborative project.  We needed to design and construct a fully functional skee-ball machine that possessed all of the qualities of the popular arcade game.  Some of the main focus points of the machine included the ball return system as well as the scoreboard that keeps track of the points scored by each player.

Electronic/Robotic Aspect

  • The electrical circuit was applied to the underside of the pocket board

  • A phototransistor was applied to the back of each pocket; each with a jumper cable attached connecting them to the beadboard

  • The phototransistors detect when a ball is scored into the pocket and sends a signal to the scoreboard to record a score

  • A scoreboard with a LED light display is connected to the pocket board to show the score each time a ball is deposited into a pocket

  • Each pocket has a different point value

  • The correct number of points are added to the score

Major Components

  • Return System

  • Basket

  • Support System

  • Pocket Board

Improvements for Future Design

  • Improve code and develop way for phototransistors to detect the ball when a specific player tosses the ball

We were able to construct a low cost, functional, stable, and marketable skee-ball machine using wood, PVC, and other household materials resulting in an old-fashioned game feel.

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Mini Piezoelectric Sonar

May 2017

​For this project we wanted to create sonar with the use of three different piezoelectric crystals of different geometriics (circle, cube, and rectangular plate). We needed to find a way to waterproof and insulate the piezooelectric buzzers. To proceed with our experiment, we sent an electrical pulse at different frequencies through a piezo buzzer underwater, and were able to read the signal through another crystal underwater with  an oscilloscope. We tested each crystal and collected data from running tests at multiple distances. Finally, we analyzed and plotted our data and presented our findings to classmates.

Scope

  • Research the development of piezoelectric crystals and how they were implemented in sonar

  • Fabricate miniature piezoelectric sonar and record data using an oscilloscope and frequency generator

  • Organize data using Microsoft Excel

  • Plot on graph

  • Present project

Address

Billerica, MA 01862
Middlesex County 
USA

Contact

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978-995-5864

©2017 by Nicholas J. LaMacchia. Proudly created with Wix.com