Arduino-Compatible Pro Micro ATmega32U4 5V 16MHz – Compact USB HID Dev Board
The Arduino-Compatible Pro Micro ATmega32U4 5V 16MHz is a compact, breadboard-friendly microcontroller development board built around the powerful ATmega32U4 chip. Unlike traditional Arduino boards that rely on a separate USB-to-serial converter (like the FTDI or CH340), the ATmega32U4 features a built-in full-speed USB 2.0 transceiver. This means the board can natively enumerate as a USB HID device — a keyboard, mouse, game controller, or MIDI instrument — directly from your code, without any extra hardware or firmware hacking. Measuring roughly 33mm by 18mm, this Pro Micro is significantly smaller than an Arduino Nano and fits neatly onto a standard breadboard with room to spare. It offers 18 digital I/O pins (of which 5 support hardware PWM), 9 analog input channels via a 10-bit ADC, a 16MHz crystal oscillator, and a micro-USB port for programming, power, and USB communication. The board runs at 5V logic level, making it compatible with the vast majority of sensors, modules, and shields in the Arduino ecosystem. Programming is straightforward via the Arduino IDE — simply select "Arduino Leonardo" or "Arduino Micro" from the board manager, hit upload, and you're ready to go. Thanks to the native USB Caterina bootloader, no external programmer is needed. The Pro Micro is widely loved by makers, hobbyists, and engineering students across India for building custom keyboards, macro pads, game controllers, USB dongles, and embedded automation projects. Whether you are prototyping a wearable gadget, building a DIY mechanical keyboard with QMK firmware, or creating a custom MIDI controller for your music setup, this tiny yet powerful board is the ideal brain for your next project. Its low cost, compact size, and native HID capability make it one of the most versatile Arduino-compatible boards available in the Indian market today.
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₹519.00
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Arduino Boards & Compatibles
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About Arduino-Compatible Pro Micro ATmega32U4 5V 16MHz – Compact USB HID Dev Board
Technical Specifications
| SRAM | 2.5 KB |
|---|---|
| EEPROM | 1 KB |
| Weight | ~4g (without headers) |
| Max VCC | 6V (absolute maximum) |
| Bootloader | Caterina (DFU-compatible) |
| Dimensions | ~33 mm × 18 mm × 4 mm |
| Clock Speed | 16 MHz (crystal oscillator) |
| Flash Memory | 32 KB (4 KB used by bootloader) |
| USB Interface | Micro-USB (native USB 2.0 full-speed) |
| Microcontroller | ATmega32U4 (8-bit AVR RISC) |
| Digital I/O Pins | 18 (5 support hardware PWM) |
| Analog Input Pins | 9 (10-bit ADC) |
| IDE Compatibility | Arduino IDE v1.0.1+ (select Arduino Leonardo or Micro) |
| Operating Voltage | 5V (logic level) |
| Input Voltage (RAW) | 6V – 12V (recommended 7V–12V) |
| DC Current per I/O Pin | 40 mA |
| DC Current for 3.3V Pin | 50 mA |
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