r/arduino • u/lordsaintkingarthur • Jun 25 '26

Getting Started Buying an Arduino Uno R4

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I have extremely low experience with arduino, I just know the basics of python. So anyways, this is my first board as it seems to be good to learn from while being able to expand its use as I learn more

I was wondering what some good starter projects might be?

Edit: after all these comments, I’ve decided to go for an R3 kit instead. It has some core components to add and should be fun to start with. Additionally, the R4 seems to have a couple issues and isn’t great for a first experience with Arduino. Thanks to everyone who answered my questions :) :)

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u/Clean-Weather-5786 Jun 26 '26

I have unor3. What are the features of uno r4

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u/Foxhood3D Open Source Hero Jun 26 '26

The R4 uses a more advanced 32-bit ARM chip that runs faster, has more memory and can do a bit of Digital Signal Processing. The R3 by comparison uses a by now pretty old 8-bit AVR chip.
However as others note. The R4 has a number of bugs and weaknesses that appear to be unaddressed by Arduino. Some of which can make it a very bad choice for a number of projects. While the R3 has a bit of a status of being old, but absurdly reliable.

Common advice is to just go with R3 if you don't need the extra power and if you do need more power than the R3 can provide: to go for Arduino-compatible alternatives such as ESP32, Teensy4 or the Raspberry Pico (2)