I²C Relay
The I²C Relay Control Module is a modular, addressable relay interface designed for distributed embedded control systems. The board enables multiple relay outputs to be controlled over a shared I²C communication bus, significantly reducing wiring complexity while maintaining deterministic and reliable switching.
This project focuses on scalable architecture, robust communication, and clean electrical design, demonstrating practical implementation of multi-node control within embedded systems.
Design Intent
The module was developed to serve as a flexible building block for larger control systems where multiple switching outputs must be coordinated from a central controller.
Key design goals included:
Reliable operation on a shared I²C bus
Addressable multi-node architecture
Electrical separation between logic and load domains
Predictable and deterministic relay switching
Scalable expansion without increasing wiring complexity
Robust switching behaviour under real load conditions