Resources:
7Semi Single-Channel 10A SPDT I2C Relay Module with Qwiic and STEMMA QT Connectivity
The 7Semi Single-Channel SPDT I2C Relay Module is designed to control higher-power electrical loads from microcontrollers and development boards using a simple 2-wire I2C interface. The relay provides NO, COM, and NC terminals for flexible switching configurations and supports loads up to 230 V AC at 10 A. It is suitable for applications such as lighting control, pumps, appliances, automation systems, and remotely controlled electrical equipment.
The module operates from a 5 V DC input while supporting I2C communication with 3.3 V and 5 V development platforms. Qwiic and STEMMA QT connectivity enables quick solderless integration, while standard header connections support custom wiring. A configurable I2C address helps integrate multiple devices on the same bus, and the onboard 3.3 V, 200 mA auxiliary output can power compatible low-power peripherals. Status LEDs, 4 mounting holes, and a compact 53 x 26 mm PCB simplify installation in embedded and automation projects.
Key Features
- I2C Relay Control: Uses SDA and SCL for digital relay switching from compatible microcontrollers.
- Single-Channel SPDT Relay: Provides 1 SPDT relay with NO, COM, and NC switching terminals.
- 230 V AC Load Support: Relay contacts support loads up to 230 V AC at 10 A under specified operating conditions.
- 5 V DC Input: Designed for operation from a 5 V DC power source.
- 3.3 V and 5 V Compatibility: Suitable for integration with common 3.3 V and 5 V development platforms.
- Qwiic Connectivity: Supports solderless connection through the Qwiic ecosystem.
- STEMMA QT Compatibility: Connector format supports compatible STEMMA QT devices and controllers.
- Configurable I2C Address: Allows the I2C address to be configured for flexible multi-device installations.
- Auxiliary Power Output: Provides a 3.3 V output with up to 200 mA available for compatible peripherals.
- Status Indication: Onboard LEDs provide visual relay and operating-status feedback.
- Development-Board Support: Compatible with Arduino, ESP32, Raspberry Pi, STM32, and RP2040 platforms.
- Compact PCB: Measures 53 x 26 mm for integration into space-conscious control systems.
- Mounting Support: Includes 4 mounting holes for secure mechanical installation.
Applications
- Smart-home automation
- Lighting control
- Pump control
- Appliance switching
- Industrial automation
- IoT control systems
- Remote equipment switching
- Microcontroller relay projects
- HVAC control interfaces
- Motor-control enable circuits
- Laboratory automation
- Building-control systems
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