Arduino Uno

Name: Arduino Uno
Brand: Arduino
SKU: arduino-uno

Arduino · arduino-uno

Identifier

arduino-uno

Pinout

Pin	Position	Type	Function	Voltage
5V	power header	power	Regulated 5 V rail for shields and modules	5 V
3.3V	power header	power	3.3 V rail for low-current modules	3.3 V
GND	power header	ground	Common ground reference
VIN	power header	power input	External input to onboard regulator	7-12 V typical
A0-A5	analog header	analog input	10-bit analogue inputs. A4 is SDA and A5 is SCL on Uno-style I2C wiring	0-5 V
D0 / RX	digital header	serial	UART receive, shared with USB serial	5 V logic
D1 / TX	digital header	serial	UART transmit, shared with USB serial	5 V logic
D2, D3	digital header	digital interrupt	External interrupt-capable digital pins	5 V logic
D3, D5, D6, D9, D10, D11	digital header	PWM	PWM-capable digital outputs	5 V logic
D10-D13	digital header	SPI	SPI SS, MOSI, MISO, and SCK pins	5 V logic
SDA / SCL	R3 header	I2C	I2C bus, also available as A4/A5 on Uno-compatible layouts	5 V logic
RESET	power header	control	Pull low to reset the board

MCUs and boards

8 other options

Compare parts

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

ESP32 DevKit v1 visual preview
ESP32 DevKit v1
Core supported ESP32 development board for Wi-Fi/Bluetooth builds. Uses 3.3 V GPIO and ESP32 board-core pin mapping.
Raspberry Pi Pico visual preview
Raspberry Pi Pico
Core supported Raspberry Pi Pico RP2040 board for breadboard-friendly 3.3 V GPIO builds. Not a full Raspberry Pi Linux computer.
Adafruit Feather nRF52840 Express visual preview
Adafruit Feather nRF52840 Express
Standalone Adafruit Feather BLE development board based on the nRF52840 and ARM Cortex-M4F. Not a Raspberry Pi or Arduino MKR accessory.
€27.21
Pan-Tilt HAT kit visual preview
Pan-Tilt HAT kit
Raspberry Pi HAT kit for pan/tilt servo control and LED or NeoPixel-style outputs. Related to Pi add-ons, not a microcontroller board replacement.
€44.76
Mini Black HAT Hack3r visual preview
Mini Black HAT Hack3r
Raspberry Pi HAT debugging and access board that exposes GPIO while using a HAT. Useful for prototyping, not a controller board or pan/tilt substitute.
€15.72
MicroSD Card Adapter for Raspberry Pi B visual preview
MicroSD Card Adapter for Raspberry Pi B
Low-profile MicroSD adapter for Raspberry Pi B. Storage accessory only, not compute, control, cooling, or communications hardware.
$3.90
Raspberry Pi Ultimate Cooling Dual Fan visual preview
Raspberry Pi Ultimate Cooling Dual Fan
Raspberry Pi cooling fan and heatsink kit. Thermal accessory only, not a board, shield, storage adapter, or controller.
$12.95
ARDUINO MKR 485 SHIELD visual preview
ARDUINO MKR 485 SHIELD
Arduino MKR shield that adds RS-485 serial connectivity for industrial or legacy systems. Needs a compatible MKR host board.
$33.80

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