Original Arduino UNO EK (एक) R4 Minima
🧠 What It Is
This board is the next-generation Arduino UNO with a modern 32-bit processor instead of the classic 8-bit chip — bringing much higher performance, memory, and advanced peripherals while keeping the familiar UNO form factor.
📊 Technical Infographic: UNO EK R4 Minima
| Arduino UNO EK R4 Minima Infographic | Microcontroller: Renesas R7FA4M1AB3CFM | | Processor: 48 MHz Arm Cortex-M4 | | Core: 32-bit, with FPU | | Operating Voltage: 5 V | | Recommended VIN: 6–24 V | | Flash Memory: 256 kB | | SRAM: 32 kB | | EEPROM: 8 kB | | Digital I/O Pins: 14 (D0–D13) | | PWM Pins: 6 (D3,5,6,9,10,11) | | Analog Inputs: 6 (A0–A5) | | USB: USB-C Full Speed | | Extra Peripherals: DAC, RTC, MPU, CTSU | | Comms Interfaces: UART, I2C, SPI, CAN | | PCB Size & Fit: UNO-compatible layout| Compatible with most existing UNO shields * Ideal for AVR → 32-bit upgrade projects
Key Advantages Compared to Older UNO R3:
💨 Much faster processor (48 MHz vs 16 MHz)
📦 8× more Flash memory & 16× more SRAM
📅 Built-in RTC (Real-Time Clock) and DAC outputs
🛠 Supports HID like keyboard/mouse emulation
🔌 USB-C connector for modern connectivity
🧩 Feature Highlights
🚀 High Performance
32-bit Arm Cortex-M4 core (48 MHz) — can handle larger code and complex tasks.
Floating-point unit for math-heavy processing.
🧪 Memory & Storage
| Memory Type | Capacity |
|---|---|
| Flash Memory | 256 kB |
| SRAM | 32 kB |
| EEPROM | 8 kB |
More space for larger sketches and data.
💡 Advanced On-Board Modules
✔ DAC (Digital-to-Analog Converter) — better audio & analog output
✔ Real-Time Clock (RTC) — keeps time accurately for clocks/data logging
✔ Memory Protection Unit (MPU) — extra safety and reliability
✔ Capacitive touch sensing (CTSU)
🔌 I/O & Communication
| Type | Ports |
|---|---|
| Digital I/O | 14 pins |
| PWM Outputs | 6 pins |
| Analog Inputs | 6 pins |
| UART | Yes |
| I2C | Yes |
| SPI | Yes |
| CAN Bus | Yes (external transceiver needed) |
Advanced communication options for sensors and devices.
⚡ Power & Protection
✔ 5 V logic level (works with existing Arduino shields)
✔ VIN 6–24 V support — flexible power options.
✔ Reverse polarity & overvoltage protection included.
📌 Why It Matters
This board represents a modern upgrade path from the classic UNO line:
➡ Better suited to IoT, robotics, edge computing, data logging, and real-time control.
➡ Students & educators can learn ARM-based embedded programming.
➡ Still supported by Arduino IDE and many libraries — easing migration.
📦 Typical Uses
Robotics & automation systems
Sensor networks and advanced data acquisition
Real-time clock applications
Audio/analog projects via DAC
CAN bus communication for automotive/industrial control
📌 Quick Comparison: UNO R3 vs R4 Minima
| Feature | UNO R3 | UNO R4 Minima |
|---|---|---|
| MCU | 8-bit AVR | 32-bit Arm Cortex-M4 |
| Clock Speed | 16 MHz | 48 MHz |
| Flash | 32 kB | 256 kB |
| SRAM | 2 kB | 32 kB |
| DAC | No | Yes |
| RTC | No | Yes |
| USB | USB-B | USB-C |
🎓 Who It’s For
✔ Beginners moving to advanced microcontrollers
✔ Robotics enthusiasts
✔ IoT developers
✔ Educators teaching embedded systems
✔ Makers requiring higher performance than classic Arduino UNO
🎨 Summary
The Original Arduino UNO EK (एक) R4 Minima is a powerful, Made in India 32-bit Arduino UNO board, combining performance, expanded memory, modern features (RTC, DAC), and compatibility with existing UNO shields — perfect for next-generation embedded projects.
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