Welcome to My Projects!
Explore my portfolio by clicking on any project in the table of contents below to jump directly to it, or feel free to scroll through to discover the wide range of projects I've created so far.
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Parkinson’s Finger Tapper
Parkinson’s Finger Tapper
Mark 2
Mark 2 aimed to make the design more compact and has undergone human trials as of now. This version of the device shows the patient's tap frequency, aiming to show if they slow down or speed up over time. The small nature of the device allows the user to not have as much weight on their wrist, which could affect results.
We have tested this on patients with varying degrees of Fredericks Disease, which is a form of Parkinson's that utilizes the finger tapping test.
It is made with a TPU case that goes around a PLA shell, which houses the electronics. An OLED Screen allows patients to see their taps and remaining time, as well as doctors utilizing the device. There is a velcro strap around the device to allow it to easily fit around a patient's wrist for comfort.
Also, as somewhat shown in the photo, are the finger caps. A ring around the thumb and a pointer finger cover, both made of Conductive PLA, allowed for the elimination of the glove with conductive tape. This further advanced the idea and reduced the weight on the patient's hands.
Mark 3 will aim to have a larger screen and better software, as well as a more compact design.
Mark 1
Initiated in the Fall of 2024 during my Electrical Systems I class, this project has evolved into a paid research opportunity through the university. The device is designed to automate the assessment of motor skills by accurately measuring the frequency of finger taps, which is crucial for the effective diagnosis and management of Parkinson’s disease.
Technical Details:
Hardware: The chassis is made of PLA and the CAD model was made in SolidWorks, it was built with an Arduino Uno R3, the setup includes a button, touch sensors, an LCD, and wires running in a Darlington pair.
Software: Developed software to manage inputs from touch sensors, control timing constraints for tests, and display real-time data on an LCD. Features include a start/reset button, a 15-second countdown timer, and an end-of-session data display, showcasing the total finger taps counted.
Impact and Role:
As the sole student researcher selected for this initiative, I have been pivotal in transitioning the device from a classroom concept to a potential diagnostic standard. This device aims to enhance the accuracy of Parkinson's disease diagnostics by minimizing human error in manual assessments, thereby improving diagnostic practices in clinical settings. My contributions are setting the stage for wider adoption in hospitals, poised to significantly impact how neurological disorders are diagnosed and monitored.
Model Rocket Air Flow Simulation
Model Rocket Air Flow Simulation
In the Winter of 2024, I decided to work on a personal project to create a rocket in SolidWorks to better understand the software.
The rocket was analyzed to evaluate its aerodynamic performance using the air as the working fluid. The titanium alloy, Titanium Ti-8Al-1Mo-1V (lowest density titanium available in SolidWorks), was selected for the rocket’s structure due to its excellent strength and durability characteristics, which are crucial for the harsh conditions of rocket flight.
The simulation visualized the velocity patterns around the rocket, showing how the air moves along and around its body and fins. The image provided highlights areas where the velocity changes, with warmer colors indicating higher speeds. These flow trajectories are vital for identifying regions of potential aerodynamic improvement and for validating the rocket's design to ensure efficient air passage, minimizing drag and improving flight stability.
SolidWorks was utilized to create a detailed mesh that adapts to the rocket's geometry, ensuring accurate simulation results. The software allows for iterative testing and modification, crucial for optimizing the rocket's design for better performance. By integrating material properties directly into the simulation environment, SolidWorks helps in assessing the structural responses under various flight conditions, providing a comprehensive view of both the aerodynamic and material performance aspects.
The combination of SolidWorks simulation tools and the robust material properties of the chosen titanium alloy provides a strong foundation for designing an effective rocket. This approach not only enhances the design process but also contributes to the overall safety, performance, and reliability of the rocket in its operational environment.
Self Oscillating Fan
Self Oscillating Fan
MachineDesignReport_Hofman_Mezzina_Strand_Lisman_Geer.pdfIn the Spring of 2025, for Machine Design, our team built a fully functional oscillating fan powered by a battery and made primarily from PLA. The goal was to create a project that utilized everything covered throughout the course.
The system is driven by a DC motor connected to a central shaft that powers both the spinning fan blades and the oscillating motion. The motor’s rotation is transferred through a gear train that includes a worm gear, which slows the output and changes the axis of rotation. This motion is then used to drive a four-bar linkage, which controls the side-to-side sweep of the fan. The four-bar mechanism was designed to maintain smooth oscillation, avoid binding, and visually demonstrate motion to users.
Although the physical prototype was printed in PLA, we performed factor of safety calculations using aluminum properties to evaluate the durability of each component under loads, as shown in the PDF.
This project gave us practical experience in designing gear-driven systems, implementing mechanical linkages, and using solid modeling and analysis to validate design performance.
PLA Motorized Locking Differential
PLA Motorized Locking Differential
In the Spring of 2025, during my Machine Design course at the University of South Florida, I had the opportunity to collaborate on a group project to make a locking differential using PLA. We set out to create a functional, low-cost prototype that could actively lock and unlock using a small DC motor, mimicking real-world traction control systems. Based on simulated driving scenarios, the design used a gear-driven motor to move a locking pin that engaged or disengaged the differential. We modeled all components in SolidWorks and used FEA to test the strength of the gears and housing, accounting for the limitations of PLA. This project gave us valuable hands-on experience with mechanical systems, gearing, and load analysis, and it allowed us to apply core engineering concepts practically and creatively without following a pre-set prompt. As shown to the left, we received first place for this project, and it was placed on display in the mechanical engineering department.
Oldham Coupling Demo
Oldham Coupling Demo
In the Spring of 2025, during my Machine Design course at the University of South Florida, I designed an Oldham Coupling to demonstrate how torque can be transferred between misaligned shafts while allowing lateral flexibility. The coupling features two outer hubs and a center disc, all 3D printed in PLA, with silicon lubricant applied to reduce friction during motion.
It was made with a 3x3 grid of holes on each side, making it easy to adjust the position and demonstrate the effects of different misalignments. This project highlights my understanding of mechanical couplings, power transmission, and practical design for hands-on demonstrations.
PLA Motorized 5-Speed Gearbox
PLA Motorized 5-Speed Gearbox
In the Spring of 2025, during my Machine Design course at the University of South Florida, I had the opportunity to collaborate on a group project to make a 5-speed gearbox out of PLA. Our group decided to base our design on the recommendations provided to us by a previous Formula 1 engineer, which no other group utilized. This was a fun and collaborative project that allowed me to learn plenty of mechanical design techniques and understand how a mechanism so crucial to running society works to benefit all of those around us.
Wheelchair Lift Assist Prototype
Wheelchair Lift Assist Prototype
In the Fall of 2024, during my Kinematics & Dynamics of Machinery course at the University of South Florida, I had the opportunity to collaborate on a transformative engineering project. Our team developed a wheelchair assist mechanism designed to enhance the mobility of individuals with limited standing capabilities significantly. Leveraging SolidWorks for detailed simulations and employing Finite Element Analysis, we meticulously fine-tuned the design to ensure functionality and safety. The device’s structure, was crafted using PLA, and the TPU gears were chosen for their durability and stress response. Our innovative lift-based mechanism provides a stable and smooth transition from sitting to standing, marking a step forward in assistive technology. This project was a testament to the power of teamwork and a valuable practical application of mechanical engineering principles, preparing me for future challenges in the field.
600N Force exerted in total ((9.81 m/s^2)*(60kg))
(60kg comes from the average person's weight)
MATLAB Electronic Noise Reduction Simulation
MATLAB Electronic Noise Reduction Simulation
In the Fall of 2023, for my Programming Concepts course, we did a project on analyzing and reducing electronic noise in wind tunnel data using MATLAB. Data from a microphone and an accelerometer were imported, processed, and structured to identify noise patterns. I implemented a block averaging technique to improve signal clarity that divided the data into multiple sets, allowing for more effective noise reduction. A custom MATLAB function was developed to systematically process and smooth the signals, averaging the values across multiple data blocks. The final visualization compared the microphone and accelerometer voltage signals over time, demonstrating the effectiveness of signal averaging in reducing unwanted noise. This project strengthened my skills in signal processing, MATLAB scripting, and data visualization while reinforcing the importance of noise reduction techniques in experimental data analysis.
Chopper Motorcycle w/ Engine
Chopper Motorcycle w/ Engine
Belt driven engine block, which was mated with the wheels.
The video above shows the belt driving the movement of the wheels.
In Fall 2023, I designed a chopper motorcycle for my CAD class to challenge myself and expand my understanding of mechanical assemblies. This project required me to learn about motorcycle design from the ground up and develop a functional and visually accurate model in SolidWorks. It was a rewarding experience that strengthened my engineering skills and prepared me for more complex designs in the future.
The chopper includes a detailed assembly of key components like the frame, engine, wheels, handlebars, and bearings. I carefully selected materials for both functionality and realism:
Frame and Wheel Structures: Titanium was used for its strength, lightweight properties, and corrosion resistance.
Engine: Aluminum was chosen for its durability and low density, reflecting real-world motorcycle engines.
Tires, Handlebars, and Belts: Rubber provided grip and flexibility.
These material choices were based on research into common practices in motorcycle manufacturing, making the design practical and realistic.
One of the biggest challenges was creating a functional engine that transferred energy through pulleys and bearings to drive the wheels. I researched various engine designs and experimented with different configurations until I achieved a system that worked smoothly. Another challenge was troubleshooting errors in the assembly, which required several redesigns and about 20-30 hours of work.
The steering system proved difficult to implement within the constraints of this project. While I was unable to fully incorporate functional steering, the project still met my primary goals for movement and assembly accuracy.
The completed chopper successfully meets my original objectives:
The engine drives the pulleys and wheels in a realistic and synchronized way.
The handlebars move in sync, adding to the design’s functionality.
Additional details, such as LED headlights and realistic brakes, enhance the overall look and feel of the motorcycle.
The project gave me a better understanding of how assemblies function as a system and how to solve problems in complex designs.
This project was a valuable learning experience that pushed my SolidWorks skills to the next level. I am now more confident in freeform design and decision-making when it comes to creating mechanical assemblies. The lessons I learned will help me in future engineering challenges, and I am proud of the skills I developed while completing this project.
Manufacturing Processes of a Out-the-Front (OTF) Knife
Manufacturing Processes of a Out-the-Front (OTF) Knife
Lisman_ManufacturingOTFKnife.pdfThis project, which I did in Fall 2024. explores the intricate manufacturing process of an Out-The-Front (OTF) knife, showcasing both innovative engineering solutions and traditional craftsmanship. The focus is on enhancing the reliability, safety, and functionality of the retractable blade mechanism.
The design process involved detailed CAD modeling to integrate various components such as the blade, handle, and internal locking mechanisms. Key elements include:
Blade: Crafted from high-carbon steel for durability, using precision water-jet cutting techniques to achieve meticulous detail.
Handle: Made from aircraft-grade aluminum for lightweight strength, shaped via CNC machining to ensure a comfortable and secure grip.
Locking Mechanism: Utilizes a combination of steel plates with machine lock actuators, ensuring a robust and reliable blade deployment.
The production involved advanced manufacturing processes to meet high-quality standards:
Metal Stamping and CNC Machining: Used for precision crafting of the components, ensuring tight tolerances and smooth operation.
Heat Treatment: Applied to enhance the toughness and longevity of the blade.
Assembly: Every knife undergoes rigorous assembly where each component is meticulously positioned and secured, ensuring operational perfection.
Each knife is subjected to comprehensive testing to ensure flawless functionality:
Deployment Testing: Ensures the blade extends and retracts smoothly without failure.
Durability Testing: Confirms the knife can withstand extensive use without degradation.
This project not only advanced my understanding of mechanical engineering in product design but also highlighted the importance of integrating high-tech manufacturing techniques with traditional methods to create superior and innovative products. The experience gained from this project is invaluable, reinforcing foundational engineering principles while pushing the boundaries of design and manufacturing.
Thermodynamics Project - HVAC System for a Residence in Tampa
Thermodynamics Project - HVAC System for a Residence in Tampa
Lisman_ThermodynamicsProject.pdfIn this project, which occurred in Spring 2024, I developed a heating, ventilation, and air conditioning (HVAC) system tailored for a residential apartment in Tampa, focusing on optimizing energy efficiency and operational costs. The challenge was to devise a system that maintained comfort throughout the year, adapting to the varying demands of summer heat and mild winter conditions prevalent in Tampa.
The system I designed integrates a compressor, an expansion valve, and two heat exchangers into a closed loop, allowing for efficient heat transfer and minimal energy loss. I utilized R-134a refrigerant for its excellent thermal properties and compatibility with residential applications. The project required detailed calculations of each component to ensure optimal functionality, from the absorption of heat in the summer to its release in the winter, facilitated by a reversing valve.
Key findings from the project indicate the necessity for a higher mass flow rate during summer to cope with increased cooling requirements. These insights are crucial for scaling the system to different residential sizes or even commercial applications, as HVAC systems are pivotal in ensuring energy efficiency and reducing operational costs in buildings.
For future improvements, I would explore alternative refrigerants like hydrofluorocarbons and advanced control systems such as smart thermostats that adjust operations based on real-time data to enhance efficiency further. The knowledge and experience gained from this project solidified my foundation in thermodynamics and systems design, which are integral to my ongoing academic and professional development in mechanical engineering.
Arduino-Based Robot Minecraft Pig
Arduino-Based Robot Minecraft Pig
Pig's Hats on CAD
Hats After 3D Printing
Pig Being Assembled 1
Pig Being Assembled 2
In the Fall of 2022, my team and I tackled an engaging project for our EGN3000L course that combined engineering with a touch of childhood whimsy. Our mission was to create a robot that could inspire children aged 7-9 to envision a future in engineering, using themes from the universally loved game Minecraft. We designed a robotic pig that was supposed to follow a luminous carrot by using IR sensors to detect light.
Our initial design incorporated LEDs in the carrot, intending for the pig to detect and follow this light. However, during testing, we encountered a significant challenge: the light emitted by LEDs didn’t work well with our IR sensors. The sensors struggled to detect the LED light consistently, which hampered the robot’s ability to follow the carrot.
This setback led us to pivot our approach. After experimenting with different light sources, we discovered that the broader spectrum of light from a smartphone flashlight was much more effective. We adjusted our design to use the phone’s flashlight as the light source for the carrot, which immediately improved the pig robot’s tracking ability. The pig was then able to detect and follow the light reliably, showcasing the importance of adaptability in engineering projects.
Through this process, we learned valuable lessons about sensor sensitivity and the practical challenges of working with different types of electronic components. While our project didn’t go as planned initially, the adjustments we made not only solved the problem but also gave us a deeper understanding of how to troubleshoot and adapt under real-world conditions. This experience highlighted the creative and iterative nature of engineering, making the project a profound learning opportunity for both us and the potential young engineers who witnessed the robot in action.
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