# Uno R3

**Type:** Product page · **SKU:** CE05629 · **Brand:** [Core Electronics](https://core-electronics.com.au/brands/core-electronics-australia)
**Page:** https://core-electronics.com.au/uno-r3.html ([markdown](https://core-electronics.com.au/uno-r3.html.md))

The Uno is a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analogue inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button.

## Pricing

- **Price:** $9.95 (inc GST) — $9.05 AUD, exc GST
- **Quantity discounts:** 5+ $8.86 (exc GST) · 15+ $8.59 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 464 today; more stock is typically available with a 8–12 day lead time.

## Description

**If you're new to Arduino®, then check out our free [online course](https://core-electronics.com.au/guides/courses/arduino-workshop-for-beginners/) where we step you through from the basics up to some advanced coding and electronics concepts.**

The Uno r3 is a microcontroller board based on the ATmega328 chip from MicroChip. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analogue inputs, a 16 MHz crystal oscillator, a USB Type B connection, a DC Power Jack, an ICSP header, and a reset button.

It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with [an AC-to-DC adapter](https://core-electronics.com.au/power-batteries/plugpacks.html) (you'll need one with a standard 5.5mm DC Barrel Jack connection) or battery to get started.

This is the latest revision of Uno and features stronger reset circuit and 16U2 microcontroller instead of the 8U2.

## What you get:

- 1 x Uno R3 Board
- 1x USB cable
 
## Features:

- **This board is a generic variant**, built from the open source Arduino® Uno R3 design. It is a compatible replacement for the [official Arduino® Uno](https://core-electronics.com.au/arduino-uno-r3.html), however, we recommend and guarantee that only the official variant will work with all Arduino® educational resources wherever it is referenced. Buying official also supports the creators and their future innovations.
- Microcontroller: ATmega328 ([datasheet](https://core-electronics.com.au/attachments/localcontent/Atmel-7810-Automotive-Microcontrollers-ATmega328P_Datasheet_85851f23dce.pdf))
- Operating Voltage: 5V
- Input Voltage (recommended): 7-12V
- 2.1mm Centre-Positive Barrel Jack (Regulates Voltage from 7-12V DC) - The Uno will use any 7-12V source here, as long as it is connected center positive and is 7-12V DC. [Here's a suitable Australian power supply.](https://core-electronics.com.au/12v-dc-2a-fixed-2-1mm-tip-appliance-plugpack.html)
- Input Voltage (limits): 6-20V
- Digital I/O Pins: 14 (of which 6 provide PWM output)
- Analogue Input Pins: 6
- DC Current per I/O Pin: 40 mA
- DC Current for 3.3V Pin: 50 mA
- Flash Memory: 32 KB (ATmega328) of which 0.5 KB used by bootloader
- SRAM: 2 KB (ATmega328)
- EEPROM: 1 KB (ATmega328)
- Clock Speed: 16 MHz
- Note that the USB to Serial conversion chip is an Atmel MEGA16U2 which is the same microcontroller as the original Arduino Uno.
 
Arduino® is a trademark of Arduino AG.

## Guides for this product

- [Laser Cut High Rise Case for the Arduino Uno](https://core-electronics.com.au/guides/laser-cutting/high-rise-case-for-the-arduino-uno-laser-cutting-tutorial/)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/0/1/018-uno-r3.jpg)