Pro Micro 5V 16MHz ATmega32U4 Mini Leonardo Board for Arduino Projects | 12 Digital I/O, Micro USB, PWM Support

Overview

The Pro Micro 5V 16MHz ATmega32U4 Development Board is an ideal compact solution for Arduino projects requiring multiple I/O pins and USB communication. Running at 16MHz and powered by 5V, this board includes 12 Digital I/O pins, 4-channel 10-bit ADC, and 5 PWM pins for precise control of your electronics. It features hardware serial connections (Rx and Tx) and built-in USB functionality, allowing it to act as a mouse, keyboard, or COM port when connected to a PC.

This microcontroller board is based on the ATmega32U4, offering direct USB communication without the need for an additional processor. It also comes with a micro USB connection, making it easy to program using the Arduino IDE. Designed to fit on a breadboard, the Pro Micro is compatible with many shields and accessories.

Key Specifications:

• Microcontroller: ATmega32U4 (5V/16MHz)
• 12 Digital I/O pins (5 PWM)
• 4-channel 10-bit ADC for precise sensor readings
• Built-in USB communication
• Compatible with Arduino Leonardo boards and IDE V1.0.1
• Micro USB for easy programming
• Onboard voltage regulator accepts up to 12V DC

Pin Diagram Explanation

The Pro Micro 5V 16MHz ATmega32U4 board is equipped with a versatile pin configuration that allows easy integration into a variety of Arduino projects. Below is an overview of the key pins and their functions:

1. Digital I/O Pins (D0 – D21):
   The board features 12 digital I/O pins, which can be configured as either inputs or outputs. Among these, 5 pins support PWM output, providing precise control for motors, LEDs, and other components requiring variable signals.
   • D0 (RX) and D1 (TX): These pins handle serial communication, allowing the board to receive and transmit data via the hardware UART interface. Perfect for communicating with sensors or other serial devices.
   • D2 – D9: General-purpose digital pins for controlling various peripherals like relays, switches, and more.
2. PWM Pins:
   Pins D3, D5, D6, D9, and D10 support Pulse Width Modulation (PWM), enabling fine control over the brightness of LEDs or the speed of motors. These pins are essential for projects involving dimming or speed control.
3. Analog Input Pins (A0 – A3):
   The board includes 4-channel 10-bit ADC (Analog to Digital Converter) pins, labeled A0 to A3, which can read sensor values such as temperature, light, or distance, providing precise analog data to your projects.
4. VCC Pin:
   This pin provides 5V of regulated voltage, perfect for powering other devices or components from the board’s power supply.
5. RAW Pin:
   The RAW pin allows you to connect an unregulated power source (up to 12V) directly to the board. The onboard voltage regulator will step this down to the appropriate 5V required by the board.
6. Ground (GND):
   The GND pins serve as the ground reference for all circuitry on the board. They are essential for completing electrical circuits in your project.
7. Micro USB Connector:
   The onboard micro USB port is used for uploading code and establishing serial communication with your computer. It also provides the option for USB power input.
8. Reset Button:
   The board includes a reset button, which allows you to restart the microcontroller easily. This is particularly useful during development and debugging.

Technical Specification

The Pro Micro has additional protection features, including a PTC fuse and diode protection on the power circuit, as well as corrections to the RX and TX LED circuits.

Package Includes:

• 1 x Pro Micro 5V 16M Mini Leonardo Microcontroller Development Board