Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards
Origin	-
Microcontroller	ATMega32U4
Operating Voltage	5V
Clock Speed	16 MHz
Digital I/O Pins	18
PWM Channels	7
Analog Input Channels	12
Flash Memory	32 KB
SRAM	2.5 KB
EEPROM	1 KB
Interface	Micro USB

6 reviews

Anonymous

Mar 28, 2026

Rating: 5/5

Excellent I2C performance

I am running multiple sensors over I2C with this board, and communication is stable. The 16MHz speed provides enough processing power for real-time data logging.

Anonymous

Mar 13, 2026

Rating: 5/5

Perfect for custom keyboard projects

This Pro Micro board works flawlessly with QMK firmware. The compact size made it easy to fit inside my mechanical keyboard case. Recognition on Windows and Linux was instant.

Anonymous

Mar 09, 2026

Rating: 5/5

Reliable for flight controller mods

Used this as a secondary controller for LED strips on my drone. The 5V output is stable, and the board handles vibration well. Highly recommended for DIY aerospace hobbies.

Anonymous

Mar 08, 2026

Rating: 3/5

Good board, cable not included

The hardware is solid, but I was disappointed that no USB cable was included in the package. Make sure you have a data-capable Micro USB cable ready before you start.

Anonymous

Mar 04, 2026

Rating: 5/5

Easy to use with Arduino IDE

As a beginner, I was worried about setup, but installing the board manager URL and selecting the correct port was straightforward. It uploaded my first blink sketch without errors.

Anonymous

Mar 01, 2026

Rating: 4/5

Great value, minor pin labeling issue

The board functions exactly as expected for the price. My only complaint is that the silkscreen labeling for some pins is a bit faint, so I had to double-check the datasheet.

5 FAQ

Q: Is there an on-board reset button?

A: Yes, there is a small reset button located near the USB connector. You can also trigger a reset programmatically by connecting the RST and GND pins.

Q: What bootloader does this come pre-flashed with?

A: It comes pre-flashed with the Caterina bootloader, which makes it compatible with the standard Arduino Leonardo profile in the IDE.

Q: How much current can the 5V pin supply?

A: The 5V pin is directly connected to the USB VBUS when powered via USB, so it can supply up to 500mA depending on your host computer's port limits. Do not exceed this.

Q: Does this board support 3.3V logic levels?

A: No, this specific model operates at 5V logic levels. Applying 3.3V to inputs may work, but output signals will be 5V, which could damage 3.3V-only peripherals.

Q: Can I use this to emulate a keyboard and mouse simultaneously?

A: Yes, the ATMega32U4 has native USB support, allowing it to emulate HID devices like keyboards, mice, and game controllers simultaneously via code.

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