Arduino UNO R4 Minima – Renesas RA4M1, 256KB Flash, Made in India
Official Arduino UNO R4 Minima – Renesas RA4M1, 48 MHz
The Arduino UNO R4 Minima is the latest entry‑level board in the iconic UNO family, now powered by a 32‑bit Renesas RA4M1 Arm Cortex‑M4 processor running at 48 MHz. It retains the familiar form factor and 5 V operating voltage of the UNO R3, making it a drop‑in upgrade for most existing projects. With 256 KB of Flash memory, 32 KB of SRAM, and a USB‑C port, it offers significantly more performance and modern connectivity while maintaining full compatibility with the vast Arduino ecosystem.
Key Specifications
| Specification | Value |
|---|---|
| Microcontroller | Renesas RA4M1 (32‑bit Arm Cortex‑M4) |
| Clock Speed | 48 MHz |
| Flash Memory | 256 KB |
| SRAM | 32 KB |
| Digital I/O Pins | 14 (all support interrupts, 5 provide PWM) |
| Analog Input Pins | 6 (12‑bit ADC) |
What You Can Build With This
- Home automation hub with Wi‑Fi/Bluetooth shield for remote appliance control
- Environmental monitoring station logging temperature, humidity, and CO₂ data
- Line‑following robot with PID motor control and sensor fusion
- Educational coding platform for learning embedded C/C++ and electronics
Compatibility
The UNO R4 Minima uses the same pinout and 5 V logic levels as the classic UNO R3, so it works with most Arduino shields and accessories. It is fully supported in the Arduino IDE 2.x and can be programmed via USB‑C. Common pairings include sensor modules (DHT22, HC‑SR04), motor drivers (L298N), and communication modules (ESP8266, HC‑05).
Wiring Notes
Power the board via the USB‑C port (5 V) or the barrel jack (7–12 V); the onboard regulator supplies 5 V and 3.3 V to the pin headers. Digital pins 0 and 1 are shared with the serial interface—avoid using them for other purposes when uploading sketches. Always place a 10 µF capacitor across the motor driver power supply if you experience resets when driving heavy loads.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino UNO R3 shields?
Yes, the UNO R4 Minima keeps the exact same pin layout and 5 V I/O voltage, so virtually all R3 shields work without modification.
Does it have built‑in Wi‑Fi or Bluetooth?
No, the Minima variant focuses on raw I/O and compute; for wireless connectivity, consider the UNO R4 WiFi board or add an ESP8266 shield.
Is this a genuine Arduino board made in India?
Yes, this is an official Arduino product manufactured under license in India, carrying the same quality assurance as boards produced elsewhere.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items