Refreshable Braille Display Project

An innovative approach to creating accessible, affordable braille display technology through servo-driven mechanical actuation and advanced software control systems.

Completed: December 2024 Mechanical & Software Systems

Arduino SOLIDWORKS Computer Vision Tkinter

2.4 Hz

Refresh Rate

±0.678 mm

Linear Accuracy

$175.95

Production Cost

Technical Overview

Core Mechanisms

The system employs a sophisticated dual servo motor configuration...

Key Components:

Servo Motors:...
Linear Cams:...
Scotch Yoke Mechanism:...
Brass Pins:...

Control Architecture

The control system implements a hierarchical Arduino-based architecture...

Software Stack:

Input Processing Layer:...
Pattern Generation:...
Hardware Abstraction:...
User Interface:...

Technical Implementation

Mechanical System Design

Linear Cam Mechanism

The linear cam design incorporates...

Dimensions:
- Section Width: 2.5 mm
- Ramp Length: 0.6 mm
- Platform Height: 0.8 mm
- Total Travel: 17.5 mm

Scotch Yoke Implementation

Modified 180° design...

Key Parameters:
- Disc Radius: 9.75 mm
- Stroke Length: 17.5 mm
- Operating Range: 180°
- Position Accuracy: ±0.65 mm

Control System Architecture

Software Architecture

Multi-layered processing...
Real-time servo position...
Error handling...
User interface...

Hardware Interface

Arduino-based control...
Serial communication...
PWM servo control
Position feedback...

Results and Analysis

Performance Metrics

Refresh Rate:...
Linear Accuracy:...
Pin Dimensions:...
Weight:...

Cost Analysis

Component	Cost
3D Printing	$160.75
Servo Motors	$13.00
Hardware	$2.20
Total	$175.95

Future Development

Mechanical Improvements

Metal cam implementation
Enhanced pin durability
Improved manufacturing precision

Software Enhancements

Advanced error correction
Expanded character support
Improved calibration systems

Scale-up Potential

Seven-character implementation
Mass production optimization
Cost reduction strategies