

PROYECTO DELTA ASSISTANCE
Design and Implementation of a Wheelchair Control and Assistance Prototype Using Eye-Tracking
- Size
- 105.9 × 64.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 26
- Nets
- 97
- Pads
- 203
- Tracks, vias
- 312, 4
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 10 Jun 2025
- Updated
- 11 Jun 2025
Overview
PROYECTO DELTA ASSISTANCE is an open-source printed circuit board by chindynamics, from the chindynamics/Delta-Assistance repository on GitHub, published under the MIT licence. It is a 2-layer board of 105.9 × 64.9 mm with 26 parts on 97 nets, routed with 312 tracks and 4 vias.
Its parts include 16 connectors and 6 resistors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
README
README.mdDelta Assistance
Delta Assistance is an assisted mobility system designed for individuals with paralysis or reduced mobility, controlled through eye-tracking. The project combines computer vision, hardware control, and accessible design to offer a functional, low-cost, and adaptable solution. This repository contains all the code, technical documentation, and resources necessary to replicate or understand the development of the project.
CONTENT
Below are the sections available to explore the project in more detail:
- Introduction: context, motivation, and project objectives.
- Installation: step-by-step guide to clone the repository, install dependencies, and run the system.
- Documentation: full technical explanation of the design, integration, and validation process.
FEATURES
The Delta Assistance system is designed to be accessible, modular, and adaptable. Its main innovation lies in the use of computer vision to interpret the user's gaze direction and convert it into commands to move a powered wheelchair. The eye-tracking interface was developed in Python based on Jason Orlosky's open-source code, while motion control was implemented on an Arduino Mega microcontroller using C++. This combination enables efficient communication between the user and the machine, even without physical contact.
In addition to the eye-tracking interface, a custom circuit board was designed to control the wheelchair motors, and a physical structure was adapted to integrate with a conventional wheelchair. The system is capable of recognizing five commands: move forward, move backward, turn left, turn right, and stop. Its design takes into account real-world environments, including varying lighting conditions and physical interference.
COLLABORATION
This project was developed by the Delta Assistance team:
- @chindynamics – Lead on computer vision pipeline and human–computer interaction design.
- @Sarao2341 – Responsible for 3D modeling and mechanical integration.
- @reginaruizz – PCB schematic and layout. Selected components for the power regulation stages.
- @Ulin78 – Electronics integration and firmware support. Assisted with PCB bring-up.
- @haydeevazquez – Sound processing and obstacle detection.
- @mirelyyc – UI and iconography designer. Created the visual assets for the desktop interface.
If you're interested in improving this system, adapting it to new needs, or contributing your expertise in software, hardware, or accessible design, you're welcome to collaborate. You can do so by opening an issue to report problems or suggestions, or by submitting a pull request with specific improvements. This project may also serve as an educational or research base for further developments in biomedical engineering and assistive technologies.
LICENSE
This project is distributed under the MIT License, meaning you are free to use, modify, and redistribute the code and resources shared here, as long as proper credit is given to the original authors.
Parts
26| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 330 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4 |
| 3 | LOGO | LOGO | G***, G***, G*** |
| 1 | 10000000 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 18000000 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 1 | Acelerometro | Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J4 |
| 1 | Arduino_Mega2560_R3_Shield | PCM_arduino-library:Arduino_Mega2560_R3_Shield | A1 |
| 1 | BOTON RESET | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J32 |
| 1 | Bateria | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-8-5.08_1x08_P5.08mm_Horizontal | J2 |
| 1 | MOTHERREGULATHOR | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-8-5.08_1x08_P5.08mm_Horizontal | J5 |
| 1 | MOTHERSCREW | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-8-5.08_1x08_P5.08mm_Horizontal | J12 |
| 1 | Relay | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J35 |
| 1 | Relay 2 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J34 |
| 1 | SERVO_1_2 | Connector_JST:JST_XH_B8B-XH-A_1x08_P2.50mm_Vertical | J6 |
| 1 | TB | Connector_JST:JST_XH_B8B-XH-A_1x08_P2.50mm_Vertical | J29 |
| 1 | U_S1 | Connector_JST:JST_XH_B8B-XH-A_1x08_P2.50mm_Vertical | J10 |
| 1 | U_S2 | Connector_JST:JST_XH_B8B-XH-A_1x08_P2.50mm_Vertical | J9 |
| 1 | U_S3 | Connector_JST:JST_XH_B8B-XH-A_1x08_P2.50mm_Vertical | J8 |
| 1 | U_S4 | Connector_JST:JST_XH_B8B-XH-A_1x08_P2.50mm_Vertical | J11 |
| 1 | driver_1 | Connector_JST:JST_XH_B8B-XH-A_1x08_P2.50mm_Vertical | J21 |
| 1 | driver_2 | Connector_JST:JST_XH_B8B-XH-A_1x08_P2.50mm_Vertical | J22 |
| 1 | ldr | Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J1 |
Questions
How big is the PROYECTO DELTA ASSISTANCE PCB?
It measures 105.9 × 64.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PROYECTO DELTA ASSISTANCE use?
26 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the PROYECTO DELTA ASSISTANCE KiCad files?
From the chindynamics/Delta-Assistance repository on GitHub, at the commit this page was made from: the board is src/PCB/PROYECTO_DELTA_ASSISTANCE.kicad_pcb and its schematic src/PCB/PROYECTO_DELTA_ASSISTANCE.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PROYECTO DELTA ASSISTANCE design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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