SainSmart Leonardo R3 Keypad V3
Best starter kit for electronics learning and rapid prototyping.
This discontinued kit offers a complete Arduino starter experience with the Leonardo R3 board and an LCD keypad shield. It's perfect for beginners wanting to dive into electronics projects, providing essential I/O and display capabilities in one package. While it lacks advanced features, its ease of use and broad compatibility make it a solid foundation for learning.
$26.99
Who it's for
- Beginners and hobbyists eager to add user interaction to projects.
- Developers creating unique human interface devices or game controllers.
- Students and budget-conscious makers building their first interactive systems.
Who should skip it
- Advanced users requiring numerous free pins for extensive project expansion.
- Makers planning to integrate multiple shields into a single project.
- Beginners accustomed to Uno expecting identical programming and debugging experiences.
Performance breakdown
Beginner Accessibility
The integrated shield removes complex wiring hurdles for first-time electronics learners.
Project Versatility
Ample I/O pins and analog inputs support a wide range of prototypes.
Interface Integration
The 1602 LCD and keypad combo provides immediate, tactile user feedback.
Power Flexibility
Multiple input options allow for both tethered development and portable project deployment.
Ecosystem Compatibility
Full Arduino IDE support ensures access to vast libraries and community resources.
Processing Overhead
The ATmega32u4 is capable but limited for complex, high-speed computational tasks.
Key Specs
Microcontroller
ATmega32u4
Operating Voltage
5V
Input Voltage (recommended)
7-12V
Digital I/O Pins
20
PWM Channels
7
Analog Input Channels
12
Flash Memory
32 KB
SRAM
2.5 KB
Clock Speed
16 MHz
LCD Display
16x2 with Blue Backlight
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