MEGA 2560 R3 development board at an angle, showing the USB-C socket, DC barrel jack, ATmega2560 chip and labelled pin headers

MEGA 2560 R3 - ATmega2560 Development Board, USB-C, Compatible with Arduino

$28.99 NZD
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MEGA 2560 R3 development board at an angle, showing the USB-C socket, DC barrel jack, ATmega2560 chip and labelled pin headers
  • MEGA 2560 R3 development board at an angle, showing the USB-C socket, DC barrel jack, ATmega2560 chip and labelled pin headers
  • Top view of the MEGA 2560 R3 board with dimensions marked: 101.6 mm long and 53.3 mm wide
  • Top-down view of the MEGA 2560 R3 USB-C board showing the header labels, ICSP header and reset button
  • Underside of the MEGA 2560 R3 board showing the soldered header pins and USB-C socket pads
MEGA 2560 R3 - ATmega2560 Development Board, USB-C, Compatible with Arduino
SKU: MEGA2560-R3-CH340-TC-1

MEGA 2560 R3 - ATmega2560 Development Board, USB-C, Compatible with Arduino

$28.99 NZD
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NZ Post: 1-2 days urban · 2-4 days rural

Shipping from $5.99 urban / $9.99 rural, or free pick-up in Te Awamutu.

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The MEGA 2560 R3 is an ATmega2560 development board with 54 digital I/O pins, 16 analogue inputs and four hardware serial ports, for projects that outgrow an Uno. This version has a USB-C socket and a CH340 USB-to-serial chip, and you program it in the Arduino IDE as an Arduino Mega 2560.

Specifications

MicrocontrollerATmega2560, 8-bit
Clock / logic16 MHz / 5 V
USBUSB-C with CH340 USB-to-serial
Digital I/O54, labelled D0-D53
PWM outputs15: D2-D13 and D44-D46
Analogue inputs16: A0-A15, 10-bit ADC
Flash / SRAM / EEPROM256 KB / 8 KB / 4 KB
I2CD20 SDA, D21 SCL
Serial0D0 RX, D1 TX, shared with USB
Serial1D19 RX, D18 TX
Serial2 / Serial3D17 RX, D16 TX / D15 RX, D14 TX
SPID50 MISO, D51 MOSI, D52 SCK, D53 SS
User LEDD13
Programming / reset2 x 3 ICSP header and reset button
Power5 V via USB-C; DC jack and VIN through the onboard regulator

Datasheets

Full technical datasheetPDF

What's in the box

1×
MEGA 2560 R3 USB-C board

Female headers and ICSP header fitted. USB-C cable not included.

Great for

Reading a dozen sensors at once
Driving a robot through motor driver boards
Talking to GPS, RS485 and Bluetooth modules on separate serial ports
Button and LED control panels
Mega shields such as RAMPS 1.4
Learning Arduino with room to grow

Wiring & getting started

  1. Connect USB

    Plug in a USB-C data cable, such as our USB-A to USB-C cable. Charge-only cables give power but no serial port.

  2. Select the board

    In the Arduino IDE choose Tools > Board > Arduino AVR Boards > Arduino Mega or Mega 2560, Processor ATmega2560, then the board's serial port. If no port appears, install the CH340 driver.

  3. Run Blink

    Open File > Examples > 01.Basics > Blink and upload. The D13 LED should turn on for one second, then off for one second.

  4. Connect your parts

    I2C is on D20/D21, not A4/A5. Keep D0/D1 free while uploading, share a ground with every module and use a level shifter for 3.3 V parts.

Frequently Asked Questions

Answers to the questions buyers ask most.

Is this an official Arduino board?
No. It is a Mega 2560 R3-compatible board built to the open Mega R3 design, with the same ATmega2560, pinout and bootloader. In the Arduino IDE you choose Arduino Mega or Mega 2560, and sketches, libraries and Mega shields work as normal.
Which board should I select in the Arduino IDE?
Choose Arduino Mega or Mega 2560 under Arduino AVR Boards, set Processor to ATmega2560, then pick the board's serial port.
Why does no serial port appear?
Usually it is a charge-only cable. Use a USB data cable and try another USB port. Windows 10 and 11 and recent macOS normally load the CH340 driver on their own; if not, install the CH340 (CH341SER) driver and plug the board in again.
Where are the I2C pins?
SDA is D20 and SCL is D21, and the separate SDA and SCL pins carry the same signals. On the Mega, A4 and A5 are ordinary analogue inputs, so Uno wiring for I2C modules needs moving to D20/D21.
Can I connect 3.3V sensors or an ESP32?
Not directly on the signal pins. The Mega runs at 5V logic, so put a level shifter between it and 3.3V parts such as an ESP32, a Raspberry Pi or many modern sensors. The 3.3V pin can power a small sensor, but it does not change the logic level.
Can the pins power a motor, relay or LED strip?
No. Use a driver board or relay module with its own supply and a shared ground. Keep each I/O pin to 20mA; 40mA is the chip's absolute maximum, not a working current.
How do I run it without a computer?
The simplest way is a 5V USB-C phone charger or power bank. The DC jack and VIN feed the onboard regulator; if you use them, check your plug is centre positive and stay around 7 to 9V so the regulator runs cool.
Do Mega shields like RAMPS 1.4 fit?
Yes. The board has the full Mega R3 header layout, including the double row at the end, so Mega shields such as RAMPS 1.4 plug straight on.
Should I get the Mega or the Uno?
Both run the same Arduino code. Choose the Mega when you need more pins, more serial ports or more memory, for example a 3D printer controller or a project with many sensors. For smaller projects our Uno R3 USB-C is cheaper and fits Uno shields.

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Why Buy from NZN

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I'm Lukas, an engineering student and maker based in Te Awamutu. NZN grew out of a CNC build that dragged on for months because every missing cable, bolt or electronic part meant another overseas order. I started the shop so Kiwi makers can spend more time building and less time waiting for the next parcel.

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