Arduino Uno R4 vs Raspberry Pi 5
Side-by-side comparison of features, pricing, ratings, and alternatives.
The Arduino Uno R4 is the latest revision of the world's most popular beginner microcontroller board, now powered by a 32-bit Renesas RA4M1 processor - a major jump from the original 8-bit design while keeping the same beginner-friendly form factor and pin layout. It remains the standard starting point for electronics education, supported by an enormous library ecosystem and the simple Arduino IDE, making it approachable for students and hobbyists building their first circuits. The WiFi variant adds built-in wireless connectivity for IoT projects, while a built-in 12x8 LED matrix on the WiFi model enables simple visual output without extra components.
The Raspberry Pi 5 is the latest generation of the popular single-board computer, offering a significant performance jump over previous models thanks to its new quad-core Arm Cortex-A76 processor. It remains credit-card sized while supporting dual 4K display output, faster networking, and PCIe expansion. It is widely used for home automation, retro gaming emulation, media centers, robotics, and as an affordable Linux desktop, backed by a large community and the official Raspberry Pi OS. With GPIO pins for hardware projects and a mature software ecosystem, it remains the default choice for hobbyist electronics and educational computing.
Around $20-27 depending on the variant.
Starting at $60 for the 4GB model.
- Extremely beginner-friendly
- Huge tutorial and library ecosystem
- Backward compatible with existing shields
- Affordable entry point
- Significant performance improvement over Pi 4
- Huge community and documentation
- Affordable for the capability offered
- Extensive GPIO for hardware projects
- Less powerful than Raspberry Pi for compute-heavy tasks
- No built-in display or OS
- WiFi variant costs more
- Requires separate purchase of case, power supply, storage
- Availability can be limited at launch
- Needs active cooling under sustained load
What reviewers say
Arduino Uno R4 Reviews
4.5 (2)Highly recommend Arduino Uno R4
I picked up Arduino Uno R4 a while back and haven't looked back. Huge tutorial and library ecosystem. One minor gripe: wifi variant costs more, but it hasn't been a dealbreaker. Would recommend.
Does exactly what we need
Been a regular user of Arduino Uno R4 for a while now. Affordable entry point. No major complaints so far. Would recommend.
Raspberry Pi 5 Reviews
No reviews yet.
More alternatives & similar tools
Alternatives to Arduino Uno R4
View all →Alternatives to Raspberry Pi 5
View all →The Verdict
AI-generated from listing dataThe Raspberry Pi 5 offers far higher compute power and OS capabilities, while the Arduino Uno R4 excels as a low‑cost, beginner‑friendly microcontroller.
Key differences
- •Pi 5 runs full Linux OS with quad‑core Cortex‑A76; Uno R4 runs bare‑metal Arduino sketches on a 32‑bit MCU
- •Pi 5 provides dual 4K HDMI, Gigabit Ethernet, Wi‑Fi 5 and PCIe; Uno R4 only optional Wi‑Fi and no native display
- •Pi 5 requires extra accessories (case, PSU, storage) whereas Uno R4 is ready‑to‑use out of the box
- •Community focus: Pi 5 has huge SBC documentation; Uno R4 leverages Arduino’s massive beginner library ecosystem
- •Price gap: Pi 5 starts at $60 for 4 GB model; Uno R4 costs $20‑27 depending on variant
Performance
Pi 5’s quad‑core Cortex‑A76 outperforms Uno R4’s 32‑bit Renesas MCU for compute‑heavy tasks.
Build quality
Both are open‑source hardware with similar community‑driven quality; no specific differences noted.
Connectivity
Pi 5 includes dual 4K HDMI, Gigabit Ethernet, Wi‑Fi 5, PCIe 2.0; Uno R4 only optional Wi‑Fi and no native video output.
Power & efficiency
Uno R4’s microcontroller consumes far less power than Pi 5’s full SBC, suitable for battery projects.
Compatibility
Uno R4 is backward compatible with classic Uno shields; Pi 5 uses GPIO and PCIe but not shield‑compatible.
Price & value
Uno R4 costs $20‑27 versus Pi 5’s $60+, offering lower entry cost.
Warranty & support
Both rely on forums and documentation; no warranty details provided.
Choose Arduino Uno R4 if…
Beginners or low‑power sensor projects that need simple code, shield compatibility, and minimal cost.
Choose Raspberry Pi 5 if…
Users needing a full Linux computer, dual‑display, or high‑speed networking for projects like media servers or AI edge computing.
Common questions
Which board is cheaper to start with?
The Arduino Uno R4 costs $20‑27, while the Raspberry Pi 5 starts at $60 for the 4 GB model.
Can I connect a standard Arduino shield to the Pi?
No; the Pi uses a 40‑pin GPIO header, not the Uno’s shield footprint, so shields are not directly compatible.
Do I need extra accessories for the Pi 5?
Yes; a case, power supply, and storage (microSD) must be purchased separately, unlike the Uno R4 which works out‑of‑the‑box.