LED Matrix Display

Objectives

Create a high-brightness LED matrix with smooth grayscale rendering
Implement efficient multiplexing for optimal refresh rates
Develop a custom PCB for reliable performance
Create a versatile firmware for various display patterns

Outcomes & Contributions

Designed and assembled a custom LED matrix using decoder and shift-register multiplexing
Created SPICE-validated schematics and a hand-built prototype
Developed AVR firmware in C++ with SPI and I²C communication
Achieved 500+ Hz refresh rate with smooth grayscale animations

Technical Details & Skills

Hardware Design

LED matrix design, multiplexing circuits, custom PCB layout

Firmware Development

AVR microcontroller programming, timing optimization, grayscale PWM

Circuit Analysis

SPICE simulation, power calculations, signal integrity

Project Overview

A custom LED matrix display with high refresh rates and grayscale rendering capabilities, designed from the ground up with a focus on efficiency and performance.

Technologies

Hardware

LEDsShift RegisterDecoderAVR MCU

Software

C++SPII²C

Key Metrics

Resolution

32x32 LEDs

Refresh Rate

500+ Hz

Development Time

3 Months