arduino › microcontroller board
arduino Arduino UNO R3
Classic 5V learning board. Pairs trivially with the entire 5V sensor catalogue but cannot drive 3.3V-only modules without a level shifter on the input side. Single hardware UART means SoftwareSerial when adding GPS/GSM alongside USB-Serial debug.
Specifications
- mcu chip
- atmega328p
- clock mhz
- 16
- flash kb
- 32
- sram kb
- 2
- wifi
- no
- wifi band
- none
- bluetooth
- none
- usb
- type_b
- gpio count
- 14
- analog inputs
- 6
- pwm pins
- 6
- i2c
- yes
- spi
- yes
- uart count
- 1
- operating voltage v
- 5
- input voltage range v
- 7-12
- power pins
- 5v, 3v3, vin
- firmware compat
- arduino_ide, platformio
- ai accelerator
- none
- form factor
- uno
Sources
- SparkFun open product catalog · ingest 2026-05-06
- Adafruit open product catalog · ingest 2026-05-06
- Arduino official product database · ingest 2026-05-06