Arduino Leonardo
Best microcontroller for creators building custom USB input devices.
This board is the gold standard for projects requiring native USB communication, letting your hardware masquerade as a keyboard or mouse with ease. While it lacks the raw processing power of newer 32-bit alternatives, its seamless integration and plug-and-play headers make it an essential, reliable workhorse for custom interface design.
$23.99
at
Micro Center
Who it's for
- Makers building custom keyboards or mouse-based automation tools
- Engineers needing extensive sensor arrays for complex data projects
- Developers integrating external modules while maintaining serial debugging
Who should skip it
- Users requiring rapid iteration and frequent code testing cycles
- Beginners who might struggle with unresponsive hardware during development
- Projects where reliable, constant USB connectivity is mission-critical
Performance breakdown
HID Functionality
Native USB support makes emulating keyboards and mice incredibly seamless.
I/O Versatility
Twenty digital pins provide ample headroom for complex sensor arrays.
Setup Convenience
Pre-soldered headers allow for immediate prototyping right out of the box.
Ecosystem Compatibility
Massive community support ensures solutions for almost any project hurdle.
Power Flexibility
Dual power options offer reliable operation for both desktop and field.
Processing Overhead
The 16 MHz clock is sufficient for most tasks but lacks high-end speed.
Key Specs
Microcontroller Processor
ATmega32U4
Clock Speed
16 MHz
Operating Voltage
5 V
Recommended Input Voltage
7-12 V
Flash Memory
32 KB
SRAM
2.5 KB
Digital I/O Pins
20
PWM Output Pins
6
Analog Input Pins
12
Physical Interface Ports
Micro USB, DC Barrel Jack
Know before you buy
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Ask Metto anything about the Arduino Leonardo before you decide.
