ATmega controller board

ATmega328P Custom Development Board

An industry-standard, standalone microcontroller development board designed using KiCad 10.0. This project serves as a robust hardware platform for learning circuit design, power regulation, and microcontroller prototyping.

📌 Project Overview

The board breaks out all digital and analog pins of the ATmega328P microcontroller to standard 2.54mm pin headers while integrating a clean power management section to ensure stable operation.

Key Hardware Features:

• Microcontroller: ATmega328P (Through-Hole DIP-28 package for easy hand-soldering).
• Power Supply: On-board LM7805 linear voltage regulator supplying a stable +5V DC output. Accepts a wide input voltage range via a 2-pin Screw Terminal.
• Decoupling Network: Optimized parallel capacitor configuration ($0.1\mu F$ Ceramic + $10\mu F$ Electrolytic) placed closest to the IC pins to suppress high-frequency noise.
• Clock Source: High-precision $16\text{MHz}$ Crystal Oscillator with matching $22\text{pF}$ loading capacitors.
• Status Indicators: On-board Power LED with a $330\Omega$ current-limiting resistor.
• Form Factor: Compact Single-Layer/Double-Layer routing with a solid Ground Plane (Copper Pour) for EMI mitigation and thermal dissipation.

🛠️ Design Parameters & Integrity

• Software Used: KiCad PCB Editor
• Design Rule Check (DRC): Passed with 0 Errors / 0 Warnings
• Track Widths: * Signal Lines: 0.25mm - 0.3mm
  • Power Lines (VCC/GND): 0.5mm - 0.6mm (Optimized for trace current density)

🛠️ Visuals & Design Layout

1. 📸 3D Render Preview

2. PCB Layout (Top & Bottom Layers)

Top Layer Layout

Bottom Layer Layout

📁 Repository Structure

This repository contains all the native design assets and manufacturing files required to replicate or modify this project.

🛠️ Core EDA Design Files (KiCad)

• ATmega controller board.kicad_sch - Schematic capture showing the ATmega328P microcontroller core, LM7805 voltage regulation circuit, decoupling networks, and crystal loading capacitors.
• ATmega controller board.kicad_pcb - Physical PCB layout featuring optimized signal trace routing, 45° angles, and solid ground planes.
• ATmega controller board.kicad_pro - KiCad project management file.

📦 Manufacturing & Fabrication Outputs

• Gerber.zip - Production-ready manufacturing package containing all necessary layers (Copper, Solder Mask, Silkscreen) and NC Drill files, ready to upload directly to JLCPCB, PCBWay, etc.