Adafruit Metro Mini 328 – Arduino-Compatible – 5V 16MHz

This is the 5V variant of the Adafruit Metro Mini 328 – Arduino-Compatible – 5V 16MHz in Boards Compatible with Arduino. Available at ₹2,004.82 (₹1,699.00 + GST) with free shipping across India.

Looking for Adafruit Metro Mini 328? Adafruit Metro Mini 328 – Arduino-Compatible – 5V 16MHz is available at Zbotic with fast shipping across India.

We use the ATmega328 for a lot of projects. The processor has plenty of GPIO, Analog inputs, hardware UART SPI and I2C, timers and PWM galore – just enough for most simple projects. When we need to go small, we use a Pro Trinket 3V or 5V, but if you want to have USB-to-Serial built-in, we reach for an Adafruit METRO Mini.

METRO Mini is the culmination of years of playing with AVRs: we wanted to make a tiny, breadboard-friendly development board that is easy to use and is hacker-friendly. Metro Mini can be programmed with the Arduino IDE (select ‘UNO’ in the boards dropdown)

• ATmega328 brains – This popular chip has 32KB of flash (1/2 K is reserved for the bootloader), 2KB of RAM, clocked at 16MHz
• Power the METRO Mini with 6-16V polarity protected on the Vin pin, or plug the micro USB connector to any 5V USB source.
• METRO has 20 GPIO pins, 6 of which are Analog in as well, and 2 of which are reserved for the USB-serial converter. There’s also 6 PWMs available on 3 timers (1 x 16-bit, 2 x 8-bit). There’s a hardware SPI port, hardware I2C port and hardware UART to USB.
• GPIO Logic level is 5V but by cutting and soldering closed a jumper on the bottom, you can easily convert it to 3.3V logic
• 5V onboard regulator with 150mA out, 3.3V 50mA available via FTDI chip
• USB to Serial converter, there’s a genuine FTDI hardware USB to Serial converter that can be used by any computer to listen/send data to the METRO and can also be used to launch and update code via the bootloader
• Four indicator LEDs, on the top of the PCB, for easy debugging. One green power LED, two RX/TX LEDs for the UART, and a red LED connected to pin PB5 / digital #13
• Easy reprogramming, comes pre-loaded with the Optiboot bootloader
• Beautiful styling by PaintYourDragon and Bruce Yan, in Adafruit Black with gold, plated pads.

The Metro Mini comes as a fully assembled and tested board, with a bootloader burned in and also a stick of 0.1″ header. Some light soldering is required if you’d like to plug it into a breadboard, or you can solder wires or header directly to the breakout pads. Once headers are installed they can be fitted into 0.6″ wide sockets.

Features: 

1. ATmega328 brains
2. 5V onboard regulator
3. Four indicator LEDs
4. Easy reprogramming

Specification:

1. ATmega328 microcontroller with Optiboot (UNO) Bootloader
2. USB Programming and debugging via the well-supported genuine FTDI FT231X
3. Input voltage (Vin): 6-16V (a 9VDC power supply is recommended)
4. 5V logic with 3.3V compatible inputs can be converted to a 3.3V logic operation
5. 20 Digital I/O Pins: 6 are also PWM outputs and 6 are also Analog Inputs
6. 32KB Flash Memory – 0.5K for bootloader, 31.5KB available after bootloading
7. 16MHz Clock Speed
8. Adafruit Black PCB with gold plate on pads
9. 18mm x 44mm x 4mm / 0.7″ x 1.7″ x 0.2″
10. Weight: 3g

Package Includes:

1 x Adafruit Metro Mini 328

About Adafruit Metro Mini 328

Adafruit Metro Mini 328 – Arduino-Compatible – 5V 16MHz is available at Zbotic, India’s trusted electronics and robotics store. Manufactured by Arduino, this product is designed for hobbyists, students, and professionals working on electronics, robotics, and DIY projects.

Product Details

• Brand: Arduino
• SKU: AI1769
• Category: Boards Compatible with Arduino

Why Buy from Zbotic?

Zbotic offers a wide range of electronics components, development boards, sensors, and robotics parts. All products are quality-checked and shipped within 24 hours. Free shipping on qualifying orders. We offer COD (Cash on Delivery) and secure online payment options. Our customer support team is available to help with technical queries about Adafruit Metro Mini 328 and other products.

Applications

Adafruit Metro Mini 328 can be used in a variety of projects including Arduino projects, Raspberry Pi builds, drone assembly, 3D printing, IoT applications, and educational experiments. Whether you are a beginner or an advanced user, this component provides the reliability and performance you need. Order your Adafruit Metro Mini 328 today and start building.

Adafruit Metro Mini 328 – Arduino-Compatible – 5V 16MHz Overview

The Adafruit Metro Mini 328 is a compact Arduino-compatible development board powered by the ATmega328 microcontroller. Running at 5V logic with a 16MHz clock, it offers USB-to-Serial built-in and breadboard-friendly form factor for rapid prototyping and embedded projects.

Key Features of Adafruit Metro Mini 328 – Arduino-Compatible – 5V 16MHz

• ATmega328 microcontroller with 32KB flash memory (0.5KB used by bootloader, 31.5KB available for sketches)
• 5V logic level with 3.3V-tolerant inputs for interfacing with lower-voltage sensors
• Integrated USB-to-Serial converter for easy reprogramming via Arduino IDE (select “UNO” board profile)
• Four onboard indicator LEDs (power, TX, RX, user) for simple status monitoring
• Breadboard-friendly 0.1″ pin spacing, exposes GPIO, analog inputs, hardware UART, SPI, I2C, timers, and PWM outputs
• Authentic Adafruit product with fast shipping from Zbotic across India

Applications and Use Cases

• Prototyping sensor-driven data loggers using analog inputs and I2C peripherals
• Controlling small robotic platforms with PWM motor drivers and GPIO expanders
• Building interactive LED displays or matrix projects with precise timer control
• Implementing serial communication tasks such as GPS or Bluetooth modules via hardware UART
• Educational kits and workshops for learning embedded programming and electronics
• Home automation interfaces combining SPI sensors and relay modules

How to Use Adafruit Metro Mini 328 – Arduino-Compatible – 5V 16MHz

Insert the Metro Mini 328 into a standard solderless breadboard, connect it to your computer via a micro-USB cable, then open the Arduino IDE. Select “Arduino/Genuino Uno” as the target board, choose the correct COM port, and upload your sketch. Power and TX/RX LEDs will indicate successful programming and serial activity.

Why Buy from Zbotic?

• Genuine Products: All items sourced from authorized distributors
• Fast Shipping: Orders ship within 24 hours with tracking (non backordered products)
• Free Shipping: Free delivery on qualifying orders
• COD Available: Cash on Delivery, UPI, cards, net banking
• Technical Support: Expert help for setup and troubleshooting
• Easy Returns: Hassle-free replacement for defective products

Frequently Asked Questions

Can the Metro Mini 328 tolerate 3.3V inputs?

Yes. Although the board operates at 5V logic, all digital input pins are 3.3V-tolerant, allowing safe interfacing with lower-voltage sensors and modules without additional level shifting.

How do I program the Adafruit Metro Mini 328?

Use a micro-USB cable to connect the board to your PC, launch the Arduino IDE, select “Arduino/Genuino Uno” under Tools → Board, choose the correct COM port under Tools → Port, and click Upload. The built-in USB-to-Serial converter handles the firmware transfer automatically.

What memory is available for my sketches?

The ATmega328 microcontroller provides 32KB of flash memory, of which 0.5KB is reserved for the bootloader. You have approximately 31.5KB free for your application code, plus 2KB of SRAM and 1KB of EEPROM for data storage.

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