Arduino UNO R4 Minima
The affordable entry to Arduino's R4 generation — Renesas RA4M1 ARM Cortex-M4F at 48MHz with 256KB flash, 32KB SRAM, 12-bit DAC, CAN bus, op-amp, and USB-C in the classic UNO form factor at 5V. No wireless, pure microcontroller power.
$15.90
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Specifications
Components
Renesas RA4M1 ARM Cortex-M4F at 48MHz with FPU, DSP, 256KB flash, 32KB SRAM, 14-bit ADC, 12-bit DAC, CAN 2.0B, and USB 2.0 Full-Speed.
Bus Interfaces
GPIO Map
Overview
The Arduino UNO R4 Minima is the no-wireless sibling of the UNO R4 WiFi, delivering the same Renesas RA4M1 ARM Cortex-M4F microcontroller upgrade at a lower price point. Running at 48MHz with 256KB flash and 32KB SRAM, it offers a massive leap over the classic ATmega328P-based UNO R3 while maintaining full pin and shield compatibility.
New peripherals include a 12-bit DAC for analog output, CAN 2.0B bus for industrial communication, an on-chip operational amplifier, and USB-C with HID support for keyboard/mouse emulation. The board accepts 6-24V input voltage, making it suitable for a wider range of power supplies. An SWD connector enables advanced debugging with external tools.
The UNO R4 Minima is ideal for makers who want more processing power and modern peripherals without the added cost of WiFi/BLE connectivity. It runs the same Arduino IDE sketches and is fully compatible with the vast UNO shield ecosystem.
Use Cases
3Educational Platform
Development boards suitable for teaching programming, electronics, and embedded systems concepts.
Signal Generator
Build a function generator producing sine, square, triangle, and arbitrary waveforms using the board's built-in DAC.
Industrial IoT
Build robust industrial IoT solutions using CAN bus, RS-485, Modbus, and wired Ethernet interfaces.
Resources
Where to Buy
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