Electrical Engineering Student

About Me

I am Junlong He, an electrical engineering student focused on embedded systems, digital hardware, and practical engineering projects.

My Engineering Story

Learning by building, testing, and documenting.

My interest in electrical engineering grew from taking apart a PlayStation controller and learning how to repair its joystick through soldering. That experience showed me how software, circuits, sensors, and physical components work together inside a real product.

Since then, I have been developing projects with Arduino, ESP32, FPGA development boards, OLED displays, NFC modules, and other electronic components. I am especially interested in systems that combine embedded software with practical hardware design.

My current main project is an ESP32-S3 portable lab station. It explores how tools such as a signal generator, oscilloscope, logic analyzer, and sensor interface can be integrated into one expandable learning platform.

This portfolio documents not only finished results, but also design decisions, tests, problems, revisions, and lessons learned throughout the engineering process.

Areas of Focus

What I am currently learning

My projects are organized around three connected areas of electrical and computer engineering.

01

Embedded Systems

Developing microcontroller-based systems with ESP32-S3, sensors, displays, communication buses, user interfaces, and real-time hardware control.

02

Digital Design

Studying Boolean logic, finite-state machines, timing, Verilog, FPGA implementation, simulation, and hardware verification.

03

Hardware Development

Learning schematic design, component selection, prototyping, measurement, protection circuits, power systems, and PCB layout.

Engineering Journey

How my interests developed

Each stage has expanded from repairing individual components to designing complete hardware and software systems.

  1. 01

    Repair and Curiosity

    Learning through electronics repair

    Repairing a controller joystick introduced me to soldering, circuit boards, components, and the internal construction of electronic devices.

  2. 02

    Embedded Prototyping

    Moving from individual circuits to systems

    Arduino and ESP32 projects helped me combine programming with buttons, displays, sensors, communication protocols, and physical interfaces.

  3. 03

    Current Direction

    Building documented engineering platforms

    I am now developing larger projects that involve modular software, digital logic, measurement, PCB planning, testing, and detailed technical documentation.

Selected Engineering Work

See how these interests become working projects.

Explore Projects