> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # SparkFun Qwiic Single Relay **Type:** Product page · **SKU:** COM-15093 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia) **Page:** https://core-electronics.com.au/sparkfun-qwiic-single-relay.html ([markdown](https://core-electronics.com.au/sparkfun-qwiic-single-relay.html.md)) Have you ever wanted to control something powerful or have you ever needed to turn on/off a high power device from your Arduino or another low powered microcontroller?... ## Pricing - **Price:** $30.90 (inc GST) — $28.09 AUD, exc GST - **Quantity discounts:** 5+ $27.25 (exc GST) · 25+ $26.69 (exc GST) · 100+ $25.56 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 2 today, and up to 180 more in 5–11 days. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=COM-15093:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/COM-15093:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description Have you ever wanted to control something powerful or have you ever needed to turn on/off a high power device from your Arduino or another low powered microcontroller? The SparkFun Qwiic Single Relay provides you with the easiest to use relay yet. The Single Relay board can handle up to 5.5A at 240VAC for long periods of time and allows you to control large power loads with simple I2C commands. Utilizing our handy Qwiic system, and on-board screw terminals, no soldering is required to connect it to the rest of your system! The Qwiic Relay comes with a default I2C address of 0x18 but can be changed with a simple command allowing you to control over 100 Qwiic Relays on a single bus (but please be aware that toggling lots of relays on a 3.3V bus can cause voltage spikes so an external power supply will be required)! In addition, there is an address jumper on the back of the board. Closing this jumper with solder will change the address to 0x19. We've included many safety precautions onto the PCB including, ground isolation between the load and the low voltage control has been increased and an air-gap has been added around the common pin. The traces between the relay and the NC/NO/COM terminals have been doubled to increase the maximum current. But if you aren't comfortable playing with high voltage AC, that's understandable. Please consider using the [IoT Power Relay](https://core-electronics.com.au/search/?q=14236), instead. It's not I2C supported but the IoT Power Relay contains shielding to prevent accidental shock and is great for learning how to use relay power accessories. [Get Started with the SparkFun Qwiic Single Relay Guide](https://learn.sparkfun.com/tutorials/qwiic-single-relay-hookup-guide) **Features** - Operating Voltage: 1.7V-3.6V - Coil Resistance: 23.5O - I2C Address: 0x18 (Default), (Jumper changes to 0x19) - Max Current (Through Relay): 5.5A (240 VAC) **Documents** - [Schematic](https://core-electronics.com.au/attachments/localcontent/Qwiic_Single_Relay_9618665c120.pdf) - [Eagle Files](https://core-electronics.com.au/attachments/localcontent/Qwiic_Single_Relay_21817266055.zip) - [Hookup Guide](https://learn.sparkfun.com/tutorials/qwiic-single-relay-hookup-guide) - [Datasheet](https://core-electronics.com.au/attachments/localcontent/3V_Relay_Datasheet_en-g5le_87307c4e92a.pdf) (G5LE) - [Firmware](https://core-electronics.com.au/attachments/localcontent/Qwiic_Relay_Firmware_1452f9886c.zip) - [Example Code](https://core-electronics.com.au/attachments/localcontent/Qwiic_Relay_Examples_5653115b62.zip) - [Qwiic Page](https://www.sparkfun.com/qwiic) - [GitHub](https://github.com/sparkfun/Qwiic_Relay) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/1/5/15093-sparkfun_qwiic_single_relay-01.jpg)