> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # 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. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=CE05629:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/CE05629:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## 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)