PCB_Design

This repository contains hardware design submissions for three electrical engineering problems, including schematics, PCB layouts, bills of materials (BOM), Gerber files, and supporting code.

Repository Structure

Hardware-Design-Projects/
│
├── Problem_3/
│   ├── images/
│   │   ├── schematic.png
│   │   └── layout.png
│   ├── Problem_3_Schematic.pdf      # Circuit schematic
│   ├── P_3_Layout.pdf                # PCB layout
│   ├── P_3_BOM.xlsx                  # Bill of materials
│   └── P_3_Gerber.zip                # Gerber files for fabrication
│
├── Problem_4/
│   ├── images/
│   │   ├── schematic.png
│   │   └── layout.png
│   ├── Problem_4_Schematic.pdf
│   ├── P_4_Layout.pdf
│   ├── P_4_BOM.csv
│   └── P_4_Gerber.zip
│
├── Problem_5/
│   ├── images/
│   │   ├── schematic.png
│   │   └── layout.png
│   ├── Problem_5_Schematic.pdf
│   ├── P_5_Layout.pdf
│   ├── P_5_BOM.csv
│   ├── P_5_Gerber.zip
│   └── Arduino_Code/                 # Firmware for the control system
│
├── Assignment_Questions.pdf          # Full problem statements
└── README.md

Project Overview

Problem	Description
Problem 3	Design of a CC-CV charging circuit for a 3S Li-ion battery pack, powered by a 12V DC adapter, with cell balancing and safety protections.
Problem 4	PCB schematic and layout design for a specified circuit.
Problem 5	Arduino-based control system for a 5V servo motor, 12V DC motor, IR sensor, and ultrasonic sensor — including circuit design, PCB design, and firmware.

See Assignment_Questions.pdf for the complete problem statements and requirements.

Schematic & PCB Previews

Problem 3: 3S Li-Ion Charger

Schematic	PCB Layout

Problem 4: PCB Design

Schematic	PCB Layout

Problem 5: Arduino Control System

Schematic	PCB Layout

Full-resolution PDFs are also available in each problem folder.

File Types

• Schematic.pdf — Annotated circuit schematics
• Layout.pdf — PCB layout files
• BOM.xlsx / BOM.csv — Bill of materials with component ratings
• Gerber.zip — Fabrication-ready Gerber files
• Arduino_Code/ — Source code for the microcontroller-based system