Is the Arduino UNO Mini compatible with standard UNO shields?

No, the Arduino UNO Mini is not physically compatible with standard UNO shields due to its significantly smaller footprint and different pin spacing. However, it is 100% software compatible, meaning you can wire the exact same sensors and modules to the Mini using jumper wires without changing your code.

What is the difference between the UNO Mini and the Arduino Nano?

While both are small, the UNO Mini retains the exact dual-processor architecture of the classic UNO (ATMega328P + ATMega16U2), offering better USB-to-serial stability. The Nano uses a different USB bridge chip (like the CH340 or FT232) and has a different pin layout designed specifically for breadboard use.

How do I power the Arduino UNO Mini if I am not using the USB-C port?

You can power the board using the VIN and GND pads located on the edge of the PCB. You should supply a stable DC voltage between 6V and 20V (12V is highly recommended) to the VIN pad, and the onboard voltage regulator will step it down to the 5V required by the processor.

Does this board work with the Arduino Cloud Editor?

Yes, the Arduino UNO Mini works out-of-the-box with both the offline Arduino Desktop IDE and the online Arduino Cloud Editor. You simply need to select "Arduino UNO" as your target board in the software, connect your USB-C cable, and you can begin uploading sketches immediately.

Can I get technical advice for my STEM project at your Hong Kong store?

Yes, you can bring your project ideas to Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po for expert advice. Our technical staff can help you select the right sensors, motor drivers, and power supplies to pair with your Arduino UNO Mini.

Arduino UNO Mini Limited Edition | USB-C ATMega328P Board

Name: Arduino UNO Mini Limited Edition | USB-C ATMega328P Board
Brand: Arduino
SKU: 21CU000183
Price: 1786.0 TWD
Availability: InStock

Short Product Description

The Arduino UNO Mini Limited Edition (ABX00062)is a highly compact, collector-grade microcontroller board that packs the full power of the classic UNO into a quarter of the size. Equipped with the proven ATMega328P processor, an upgraded USB-C connector, and 14 digital I/O pins, it is the ultimate brain for space-constrained DIY robotics and STEM education projects. Available for instant pickup at Sun Cheong Computer Co. Ltd.(新昌電腦有限公司) in Sham Shui Po, our technical staff can provide expert advice on integrating this miniature powerhouse into your custom electronic builds.

Key Features

ATMega328P Processor: Features the legendary 8-bit AVR microcontroller running at 16MHz, ensuring 100% code compatibility with classic UNO projects.
Modern USB-C Port: Upgraded with a reversible USB-C connector for convenient programming, serial debugging, and 5V power delivery.
Ultra-Compact Footprint: Measures only 34.20mm x 26.70mm, making it perfect for embedding into tight 3D-printed enclosures and wearable tech.
Comprehensive I/O Array: Retains the standard 14 digital input/output pins (including 6 PWM channels) and 6 analog inputs for versatile sensor integration.
Dual Mounting Options: Designed with both standard female headers for jumper wires and castellated edges for direct surface-mount soldering.
Collector's Edition Design: Features a stunning black and gold PCB finish, celebrating the anniversary of the world's most popular development board.

Full Product Description

Compact Powerhouse for STEM and Prototyping

The Arduino UNO Mini Limited Edition delivers the exact same performance and pinout logic as the industry-standard Arduino UNO, but in a drastically reduced 34.2mm x 26.7mm footprint. This miniature development board is engineered for creators who need reliable processing power for space-constrained projects, such as wearable technology, miniature robotics, or compact IoT sensor nodes. Because it utilizes the identical ATMega328P microcontroller, all your existing UNO sketches, libraries, and code will run flawlessly without requiring any software modifications.

Modern USB-C Connectivity and Classic Architecture

This Miniature Microcontroller Board modernizes the classic Arduino experience by replacing the bulky USB-B port with a sleek, reversible USB-C connector. This upgrade not only saves physical space on the PCB but also allows you to program the board and supply 5V power using the same modern cables you use for your smartphone. Despite its small size, it retains the ATMega16U2 USB-to-serial bridge coprocessor, ensuring lightning-fast code uploads and stable serial communication with your computer.

Pro Tip from Our Technicians

When powering the Arduino UNO Mini via the VIN pad instead of the USB-C port, our Sham Shui Po technical team strongly advises keeping your input voltage between 6V and 12V for optimal thermal performance. Although the manufacturer datasheet states an absolute maximum of 20V, running the board near this limit will cause the onboard step-down converter to generate excessive heat, potentially damaging your project enclosure. Additionally, take advantage of the board's castellated edges if you plan to solder it directly onto a custom carrier board for permanent industrial installations.

Technical Specifications

Brand: Arduino
Model: UNO Mini Limited Edition (SKU: ABX00062)
Main Microcontroller: ATMega328P (AVR CPU up to 16 MHz)
USB Bridge Coprocessor: ATMega16U2
Memory: 32 kB Flash, 2 kB SRAM, 1 kB EEPROM
Digital I/O Pins: 14 (of which 6 provide PWM output)
Analog Input Pins: 6
Operating Voltage: 5V
Input Voltage (VIN): 6V - 20V (Recommended 6V - 12V)
Programming Interface: USB-C
Dimensions: 34.20mm x 26.70mm

Delivery Options

Local delivery within Hong Kong and in-store pickup.
Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
In-store pickup details (location and time) will be confirmed by email or phone message.
Delivery times are estimates and may be affected by weather or unforeseen circumstances.

FAQ Section

Is the Arduino UNO Mini compatible with standard UNO shields?No, the Arduino UNO Mini is not physically compatible with standard UNO shields due to its significantly smaller footprint and different pin spacing. However, it is 100% software compatible, meaning you can wire the exact same sensors and modules to the Mini using jumper wires without changing your code.
What is the difference between the UNO Mini and the Arduino Nano?While both are small, the UNO Mini retains the exact dual-processor architecture of the classic UNO (ATMega328P + ATMega16U2), offering better USB-to-serial stability. The Nano uses a different USB bridge chip (like the CH340 or FT232) and has a different pin layout designed specifically for breadboard use.
How do I power the Arduino UNO Mini if I am not using the USB-C port?You can power the board using the VIN and GND pads located on the edge of the PCB. You should supply a stable DC voltage between 6V and 20V (12V is highly recommended) to the VIN pad, and the onboard voltage regulator will step it down to the 5V required by the processor.
Does this board work with the Arduino Cloud Editor?Yes, the Arduino UNO Mini works out-of-the-box with both the offline Arduino Desktop IDE and the online Arduino Cloud Editor. You simply need to select "Arduino UNO" as your target board in the software, connect your USB-C cable, and you can begin uploading sketches immediately.
Can I get technical advice for my STEM project at your Hong Kong store?Yes, you can bring your project ideas to Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po for expert advice. Our technical staff can help you select the right sensors, motor drivers, and power supplies to pair with your Arduino UNO Mini.

Target Users / Applications

STEM Educators & Students: Building compact, intelligent science fair projects that require the processing power of an UNO without the bulky footprint.
Custom Keyboard Makers: Utilizing the ATMega16U2 USB bridge and compact size to build custom macro pads or mechanical keyboard controllers.
Industrial Prototypers: Surface-mounting the board via its castellated edges onto custom PCBs to act as the logic brain for Programmable Logic Controllers (PLCs).