Introduction
The SparkFun Qwiic Relay - 1X1A DPDT lets you control high power devices from a microcontroller over I2C. This relay breakout uses the G6K-2F-Y DC3 dual-pole/dual-throw relay from Omron Electronic Components capable of switching loads of 1A/30VDC and 0.3A/125VAC (at 40°C) with very low drive currents to switch the relay.
This board has one 3-pin screw terminal connector for solderless connection to one of the relay's terminals and a 0.1"-spaced plated through-hole header for connecting the second terminal. It also has options to drive the relay over I2C (via Qwiic or a soldered connection) or an external drive input such as a switch or I/O signal. Driving the relay over I2C only requires up to 5.8mA@3.3V and driving it from an external input requires up to 33mA@3.3V.
Required Materials
In order to follow along with this guide you'll need the SparkFun Qwiic Relay - 1X1A DPDT along with the following items:
- SparkFun RedBoard IoT - ESP32 (Or a similar Arduino microcontroller)
- Qwiic Cable
- USB-C Cable
- DC or AC Load
Topics Covered
This guide contains three main sections: Quickstart Guide, Hardware and Software.
The Quickstart Guide goes over how to connect a load to the Qwiic Relay - 1X1A DPDT and then control it over I2C while connected over a Qwiic cable to a SparkFun RedBoard IoT - ESP32 using the SparkFun GPIO Expander Arduino Library.
The Hardware section includes the Hardware Overview and provides a detailed overview of the Qwiic Relay - 1X1A DPDT. The Hardware Assembly page covers how to connect a load to the relay and connect the board to a microcontroller.
The Software section covers how to install and use the SparkFun GPIO Expander Arduino library with the Qwiic Relay - 1X1A DPDT.
Resources and Support Documentation
You'll find the board design files (KiCad files & schematic), relevant documentation (datasheets, white papers, etc.) and other helpful links in the Resources. Lastly, the Support section includes a Troubleshooting page that includes any helpful tips specific to this board as well as information on how to receive technical support from SparkFun.