> **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

# IO Expansion HAT for Raspberry Pi 4B/3B+

**Type:** Product page · **SKU:** DFR0566 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/io-expansion-hat-for-raspberry-pi-4b-3b.html ([markdown](https://core-electronics.com.au/io-expansion-hat-for-raspberry-pi-4b-3b.html.md))

This IO Expansion HAT from DFRobot is the perfect companion for your Raspberry Pi 4B/3B+! It leads out all of the IO ports on Raspberry Pi including digital port...

## Pricing

- **Price:** $16.85 (inc GST) — $15.32 AUD, exc GST
- **Quantity discounts:** 6+ $14.55 (exc GST) · 12+ $13.94 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 250 more in 8–12 days.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=DFR0566:1` (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/DFR0566:1.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

**Introduction**  This IO Expansion HAT from DFRobot is the perfect companion for your [Raspberry Pi 4B/3B+](https://www.dfrobot.com/category-157.html)! It leads out all of the IO ports on [Raspberry Pi](https://www.dfrobot.com/category-153.html) including digital port, analog port, PWM, IIC, UART, SPI, and IIS. Besides that, the HAT is totally compatible with [DFRobot Gravity Series](https://www.dfrobot.com/gravity), which frees users from complicated connection work and enables them to just concentrate on their projects building.![](https://image.dfrobot.com/image//data/DFR0566/1.jpg)

[Raspberry Pi ](https://www.dfrobot.com/category-153.html)GPIO pins work with a maximum logic level of 3.3V. Besides the[ sensor ](https://www.dfrobot.com/category-36.html)and [module ](https://www.dfrobot.com/category-156.html)of 3.3V power supply, the product also supports:

- Sensor and module with 5V power supply and 3.3V level
- PWM external power supply (6~12V)
- Controlling multiple servos
 
![](https://image.dfrobot.com/image//data/DFR0566/2.jpg)

 **Dimension Diagram**

  **Specification** - Operating Voltage: 5V
- PWM Port External Power: 6-12V
- Sensor Interface External Power: 3.3V
- Dimension: 65\*56 mm/2.56\*2.20”
 
  **Documents** 17. [Product wiki](https://wiki.dfrobot.com/IO%20Expansion%20HAT%20for%20Raspberry%20Pi%20%20SKU%3A%20%20DFR0566)
  **Parts List** - IO Expansion HAT x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/d/f/dfr0566-1.jpg)