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Green rectangular circuit board with USB port and pin headers

Arduino

Arduino A000066 Uno Rev3 development board

SKU CH-BQB3-GZPZ7 MPN A000066

Microcontroller board with 14 digital I/O pins, 6 analog inputs, 16 MHz crystal and USB connection

  • Width and length2.7 in × 2.1 in
  • Key featuresArduino Uno is a microcontroller board based on the ATmega32
  • ATmega328 microcontroller with 32KB Flash and 2KB RAM
  • 14 digital I/O pins including 6 PWM outputs for versatile control
  • 6 analog inputs enable sensor and signal reading
  • 16 MHz crystal oscillator provides stable timing
  • USB connection and power jack offer flexible powering options

Arduino Uno Rev3 microcontroller board

The Arduino Uno Rev3 is a microcontroller board based on the ATmega328P. It provides 14 digital input/output pins with 6 PWM outputs and 6 analog inputs. A 16 MHz quartz crystal drives the system clock. The board measures 2.70 by 2.10 inches and connects via USB.

Suitable for learning electronics

This board suits students and makers learning electronics or building sensor and actuator projects. It is the reference model for the Arduino platform and works with the standard IDE. Builders needing integrated wireless connectivity or more memory should consider other options.

ATmega328P with 32KB Flash and 2KB RAM

The microcontroller offers 32KB of Flash memory for program storage and 2KB of RAM for runtime data. This capacity defines the complexity of sketches that can run. Verify that your application fits within these limits before purchasing.

How it compares

Measured against everything we stock in Single-Board Computers & Dev Kits, at today’s prices. Recalculated every night.

Price $17.99
Cheaper than about 91% of the 1,420 comparable items (median $44.99).

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Specifications

Product
Brand nameArduino
Model nameA000066
Size & build
Width and length2.7 in × 2.1 in
Shipping weight0.05 kg
Package size84 × 61 × 25 mm

Questions about this item

How do I install the Arduino Uno Rev3 and which step is often missed?

Connect the board to a computer with a USB cable; the driver installs automatically on most systems, but you must select the correct port and the Arduino Uno board type in the IDE before uploading your first sketch.

What maintenance or replacement will the Arduino Uno Rev3 need later?

The ATmega328 microcontroller socketed on the board can be replaced if a pin is damaged; otherwise the board has no moving parts or consumable components that require scheduled servicing.

What limit appears first when the Arduino Uno Rev3 runs continuously?

The 32 KB flash memory and 2 KB RAM on the ATmega328 constrain program size and variable space, so large sketches or heavy data buffering hit that ceiling before thermal or power limits.

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