The Arduino Uno Rev3 is the third revision of the classic Arduino Uno board. ... However, the R4 WiFi introduces new pinouts and special pin functions you don't see on the Rev3.

Each of the 14 digital pins on the Arduino Uno can be used as an input or output, using pinMode(), digitalWrite(), and digitalRead() functions. They operate at 5 volts. Each pin can provide or receive ...

Both the Arduino Nano and Uno can be powered via their integrated USB connectors. This automatically supplies regulated 5V power to the board, allowing you to use any USB-supported power source ...

Now let's look at the pinout for the Arduino Uno R4 WiFi development board. As you can see it is very similar to the Uno R3 development board but with each pin with more functions. It also provided ...

Two versions of the new 32-bit Arduino UNO board will be offered: UNO R4 WiFi and UNO R4 Minima with the only difference being the former getting an ESP32-S3 module for wireless connectivity. Arduino ...

I myself own an Arduino Uno R3 and found that it can simplify my projects development and microcontroller programming, but sometimes I need to know the Arduino pinout. That is why I have written this ...