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Arduino UNO

The Arduino UNO is the flagship board of the Arduino family. It is a bit large in size and is used standalone, not on a breadboard, but it is a robust board, making it a good choice for beginners.

The most recent release of the Arduino UNO is R4 (the previous one was R3) and it comes with an LED Matrix and WiFi and BLE built-in. What is most notable for folks in India is that there is a version now made in India and named Arduino Ek R4. We have a project dedicated to the Arduino Ek R4.

The Uno uses a USB-A/B cable with a USB-B connector on the Uno and a USB-A connector on the other side to plug it into a computer.

Output VoltageOperating VoltageMaximum CurrentWiFiBLEUSB Connector
5V 3.3V
5V
Type B
Type B

Detailed Pinout

Nano Detailed Pinout