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Arduino Mega 2560 Rev3

OverviewPinoutWiringRelated groups
Arduino Mega 2560 Rev3 — DFRobot — DFR0108

The Mega 2560 microcontroller board offers 54 digital I/O pins, 16 analog inputs, USB connectivity, and compatibility with numerous shields. Ideal for advanced projects.

Offers

  • DFRobot$48.00

Offers

  • DFRobot$48.00

Pinout

  • VIN

    External input voltage pin on the Arduino Mega 2560 Rev3 power header.

    Type · powerVoltage · Input supply to onboard regulator; Arduino docs recommend 7-12V board input.
  • +5V

    Regulated 5V rail on the board power header.

    Type · powerVoltage · 5V
  • +3V3

    Regulated 3.3V rail on the board power header.

    Type · powerVoltage · 3.3V
  • GND

    Ground pins on the board power/header connectors.

    Type · groundVoltage · 0V reference
  • RESET

    Reset line exposed on the board header.

    Type · controlVoltage · 5V logic domain
  • D0 / RX0

Start wiring

UART · I2C · Analog · Input supply to onboard regulator; Arduino docs recommend 7-12V board input. · 5V

Confirm the data interface matches your host board.

Module pins: VIN, +5V, +3V3, GND, D20 / SDA, D21 / SCL, A0-A15 / D54-D69, ICSP MOSI / MISO / SCK. Schematik maps them to your board in the app.

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Connectors

Sort passive connector adapters from Qwiic boards, LCD modules and microSD card adapters before assuming anything with the right plug will substitute safely.

Connectors & cables · Connectors · 28 parts

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Displays

Character LCDs, SPI TFTs, e-paper modules and larger capacitive-touch TFT panels solve different display jobs. Treat display class, interface, controller, resolution, touch, refresh behaviour, storage, voltage and mounting as separate swap checks.

Displays · TFT & LCD displays · 35 parts

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Air quality

Choose between MQ gas sensors, VOC/eCO2 indoor-air sensors, true CO2 modules and particulate sensors without treating every air-quality breakout as the same detector.

Sensors · Gas & air-quality sensors · 31 parts

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MCUs and boards

ESP32, Arduino Uno, Raspberry Pi Pico, and compatible add-on boards for running builds.

Boards · Microcontroller boards · 24 parts

Parts tray full · 5 max · remove a part to add another
D0

Digital pin 0, UART0 receive.

Type · digitalVoltage · 5V logic
  • D1 / TX0D1

    Digital pin 1, UART0 transmit.

    Type · digitalVoltage · 5V logic
  • D2-D13D2-D13

    Digital GPIO header pins; D2-D13 include interrupt/PWM/SPI-adjacent functions as labelled in the official full pinout.

    Type · digitalVoltage · 5V logic
  • D14-D19 / TX3 RX3 TX2 RX2 TX1 RX1D14-D19

    Additional digital pins used for UART3, UART2, and UART1 serial interfaces.

    Type · digitalVoltage · 5V logic
  • D20 / SDAD20

    I2C data line, also digital pin 20.

    Type · i2cVoltage · 5V logic
  • D21 / SCLD21

    I2C clock line, also digital pin 21.

    Type · i2cVoltage · 5V logic
  • D22-D53D22-D53

    Extended Arduino Mega digital GPIO header pins.

    Type · digitalVoltage · 5V logic
  • A0-A15 / D54-D69A0-A15

    Sixteen analogue input pins, also usable as digital pins D54-D69.

    Type · analogVoltage · Analogue input range tied to board reference, normally 0-5V unless AREF is used.
  • AREFAREF

    Analogue reference input for ADC measurements.

    Type · analog referenceVoltage · Reference input for analogue converter; use per Arduino analogue reference guidance.
  • ICSP MOSI / MISO / SCKICSP

    SPI signals exposed on the ICSP header.

    Type · spiVoltage · 5V logic
  • PinPositionTypeFunctionVoltage
    VINpowerExternal input voltage pin on the Arduino Mega 2560 Rev3 power header.Input supply to onboard regulator; Arduino docs recommend 7-12V board input.
    +5VpowerRegulated 5V rail on the board power header.5V
    +3V3powerRegulated 3.3V rail on the board power header.3.3V
    GNDgroundGround pins on the board power/header connectors.0V reference
    RESETcontrolReset line exposed on the board header.5V logic domain
    D0 / RX0D0digitalDigital pin 0, UART0 receive.5V logic
    D1 / TX0D1digitalDigital pin 1, UART0 transmit.5V logic
    D2-D13D2-D13digitalDigital GPIO header pins; D2-D13 include interrupt/PWM/SPI-adjacent functions as labelled in the official full pinout.5V logic
    D14-D19 / TX3 RX3 TX2 RX2 TX1 RX1D14-D19digitalAdditional digital pins used for UART3, UART2, and UART1 serial interfaces.5V logic
    D20 / SDAD20i2cI2C data line, also digital pin 20.5V logic
    D21 / SCLD21i2cI2C clock line, also digital pin 21.5V logic
    D22-D53D22-D53digitalExtended Arduino Mega digital GPIO header pins.5V logic
    A0-A15 / D54-D69A0-A15analogSixteen analogue input pins, also usable as digital pins D54-D69.Analogue input range tied to board reference, normally 0-5V unless AREF is used.
    AREFAREFanalog referenceAnalogue reference input for ADC measurements.Reference input for analogue converter; use per Arduino analogue reference guidance.
    ICSP MOSI / MISO / SCKICSPspiSPI signals exposed on the ICSP header.5V logic