---
product_id: 48314185
title: "ELEGOO MEGA R3 Board ATmega 2560 + USB Cable Compatible with Arduino IDE Projects RoHS Compliant"
brand: "elegoo"
price: "HK$311"
currency: HKD
in_stock: true
reviews_count: 8
category: "Elegoo"
url: https://www.desertcart.hk/products/48314185-elegoo-mega-r3-board-atmega-2560-usb-cable-compatible-arduino
store_origin: HK
region: Hong Kong
---

# 16 MHz ATmega2560 MCU speed Expanded pinout with SDA, SCL & IOREF USB + DC barrel jack power options ELEGOO MEGA R3 Board ATmega 2560 + USB Cable Compatible with Arduino IDE Projects RoHS Compliant

**Brand:** elegoo
**Price:** HK$311
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your maker game with ELEGOO MEGA R3 — where power meets precision!

## Quick Answers

- **What is this?** ELEGOO MEGA R3 Board ATmega 2560 + USB Cable Compatible with Arduino IDE Projects RoHS Compliant by elegoo
- **How much does it cost?** HK$311 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/48314185-elegoo-mega-r3-board-atmega-2560-usb-cable-compatible-arduino)

## Best For

- elegoo enthusiasts

## Why This Product

- Trusted elegoo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ready Out-of-the-Box:** Includes USB cable and everything needed to jumpstart your creative engineering projects immediately.
- • **Enhanced Reset Circuit:** Stronger reset mechanism guarantees reliable restarts during intense prototyping sessions.
- • **Robust Power Flexibility:** Power via USB or a sturdy 5.5x2.1mm DC barrel jack for versatile deployment anywhere.
- • **Future-Proof Pinout Design:** New SDA, SCL, and IOREF pins ensure your shields adapt effortlessly to evolving voltage standards.
- • **Seamless Arduino IDE Compatibility:** Plug & play with all Arduino Mega R3 shields for instant project integration.

## Overview

The ELEGOO MEGA R3 Board features the powerful ATmega2560 microcontroller running at 16 MHz, fully compatible with Arduino IDE and most Mega R3 shields. It boasts an improved pinout including SDA, SCL, and IOREF pins for enhanced shield compatibility, a stronger reset circuit, and flexible power options via USB or DC barrel jack. RoHS compliant and ready to power your advanced DIY electronics and prototyping projects.

## Description

Free delivery and returns on eligible orders. Buy ELEGOO MEGA R3 Board ATmega 2560 + USB Cable Compatible with Arduino IDE Projects RoHS Compliant at desertcart UK.

Review: Great for Mobiflight & Flight Sim - Works great, I use this with mobiflight in a home cockpit and it works fantastic allowing for LEDs and buttons/switches to work with flight sim. Highly recommended
Review: Gud - Nice and convienient, plenty pins to derrange engineering madness onto

## Features

- The Mega is 100% compatible with Arduino IDE and most shields designed for the Arduino mega R3，RoHS Compliant
- The chip is Atmega+2560-16au and 16u2, same with the official version.
- Improved and expert version: 1. 0 pinout: added SDA and SCL pins that are near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board. In future, shields will be compatible both with the board that use the AVR, which operate with 5V and with the Due that operate with 3. 3V. The second one is a not connected pin, that is reserved for future purposes.
- Stronger RESET circuit. Use 5. 5 * 2. 1mm DC barrel jack (compatible with 5. 5 * 2. 5mm DC barrel jack)
- It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06XKHN62M |
| Are Batteries Included | No |
| Best Sellers Rank | 4,319 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 19 in Motherboards |
| Brand | ELEGOO |
| Colour | Blue |
| Customer Reviews | 4.8 4.8 out of 5 stars (942) |
| Date First Available | 9 Aug. 2017 |
| Graphics Card Description | Integrated |
| Graphics RAM Type | DIMM |
| Guaranteed software updates until | unknown |
| Hard Disk Description | HDD |
| Hard Drive Interface | ATA-4 |
| Hardware Platform | Arduino |
| Item Weight | 70 g |
| Item model number | UK-EL-CB-003 |
| Manufacturer | ELEGOO |
| Memory Technology | DDR |
| Operating System | Windows 10 |
| Optical Drive Type | BD-R |
| Processor Brand | Atmel (Microchip) |
| Processor Count | 1 |
| Processor Speed | 16 MHz |
| Product Dimensions | 10.49 x 5.51 x 0.99 cm; 70 g |
| Series | Mega R3 |
| Standing screen display size | 3 |

## Product Details

- **Brand:** ELEGOO
- **CPU speed:** 16 MHz
- **Connectivity technology:** USB, DC
- **Memory storage capacity:** 256 KB
- **Model name:** Mega R3

## Images

![ELEGOO MEGA R3 Board ATmega 2560 + USB Cable Compatible with Arduino IDE Projects RoHS Compliant - Image 1](https://m.media-amazon.com/images/I/71f3KuLo7jL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: Can this be used to make a button box for PC please?**
A: Hello Dom,
Thank you for your question. We would suggest arduino leonardo or PRO Micro for they are more convenient to connect PC.
Please let us know if you need any further details and wish you a great day!
Kind regards,
Elegoo Team

**Q: What is the usb to serial converter chip on this one?**
A: Hello Matthew,

Thank you for your question. It is ATmega 16U2. Please let us know if you need any further details. Have a nice day!

Kind regards,
Elegoo Team

**Q: Can i use 12v inputs with this board?**
A: As you ask about inputs in plural then, as others have said, absolutely not for GPIOs which are limited to the nominal 5V max. You must translate high-voltage bidirectiinal input logic to 5V, or simply drop with resistor dividers if input-only to avoid MCU destruction.

As for the source supply, 12V is fine but unnecessary for on-board regulators, and will increase heat dissipation from them under load.

If nothing demands shared Vin at higher voltage (e.g. plug-on shield boards, etc), then 7.5V is a good compromise for the 5V linear regulator to function normally under load - affording enough headroom whilst minimising dissipation that can be calculated by (Vin-5V) x Load Current. For example, at 100mA from the 5V regulator with a 7.5V supply, regulator dissipation will be 0.25W, but with 12V supply then dissipation will be almost 3x more at 0.7W for generally no gain.

Furthermore, as the 3.3V regulator is directly powered from the 5V regulator, then any load on 3.3V adds further to both 5V regulator dissipation and total board heat dissipation in exactly the same way - specifically (5V-3.3V) x Load Current, plus the same current added to the 5V regulator.

This is a general rule for constant loads, but just wanted to highlight thermal dissipation concerns which can become a limitation, and why a reduced source supply is advisable wherever possible.

**Q: Usinmg serial.print (or println using IDE is not working or producing any results, anyone else had this problem or know how to fix it?**
A: SerialMonitor
SITUATION: The Arduino is connected to a computer. The Arduino IDE is running and the Serial Monitor is open. The Arduino sketch contains Serial.print() and Serial.println() statements but the text is not appearing in the Serial Monitor.

 STEP 1: Verify the Arduino and the Arduino IDE are connected to the same communications port. These can become separate if the Arduino is unplugged and plugged back in. A simple way to be certain the port is correct is by re-uploading the sketch from the same IDE that is used to open the Serial Monitor.

 STEP 2: Verify the Serial Monitor on the computer and the Serial Port on the Arduino are set to the same data rate. The data rate is often referred to as the baud rate.
Verify the data rate specified in the Serial.begin() statement is the same value as the data rate set for the Serial Monitor.
 STEP 3: Closely examine the Arduino sketch. Be certain the Serial.begin() programming statement is being executed. If it is not then the Serial Port will not function.
STEP 4: Closely examine the Arduino sketch. Be certain the Serial.print() and Serial.println() statements are being executed. Sometimes a branching statement, such as if and else, will cause these statements to be missed.
STEP 5: Check the Serial.print() and Serial.println() statements for syntax errors. Since print and println are common among several programming languages sometimes a usage that is valid in one doesn't work with the Arduino. 
STEP 6: Examine both the Arduino sketch and the wiring of any circuit connected to the Arduino. Make certain the digital pins 0 and 1 are not being used. Both are connected to the components on the Arduino that performs the serial text communication and may not be simultaneously used for something else.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great for Mobiflight & Flight Sim
*by S***D on 19 November 2025*

Works great, I use this with mobiflight in a home cockpit and it works fantastic allowing for LEDs and buttons/switches to work with flight sim. Highly recommended

### ⭐⭐⭐⭐⭐ Gud
*by R***R on 27 January 2026*

Nice and convienient, plenty pins to derrange engineering madness onto

### ⭐⭐⭐⭐⭐ Good price for this board
*by L***C on 27 July 2025*

Worked straight out of the box Might buy another for my next project Right price too

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-02-21*