There are several variants of Arduino boards available, each with its own unique set of features and capabilities. Here are some of the most popular Arduino boards and their key characteristics:
1. Arduino Uno: This is the most popular Arduino board, featuring an ATmega328P microcontroller and a range of digital and analog input/output pins. It has 14 digital pins, 6 analog pins, and can be powered by USB or an external power source.
2. Arduino Mega: This board is similar to the Uno but features an ATmega2560 microcontroller, which provides more memory and a greater number of input/output pins. It has 54 digital pins, 16 analog pins, and can be powered by USB or an external power source.
3. Arduino Nano: This is a smaller and more compact version of the Uno, featuring an ATmega328P microcontroller and a similar set of input/output pins. It has 14 digital pins, 8 analog pins, and can be powered by USB or an external power source.
4. Arduino Leonardo: This board is similar to the Uno but features an ATmega32U4 microcontroller, which provides native USB connectivity and can act as a keyboard or mouse. It has 20 digital pins, 12 analog pins, and can be powered by USB or an external power source.
5. Arduino Due: This board features an ARM Cortex-M3 microcontroller and provides more processing power and memory than the Uno or Mega. It has 54 digital pins, 12 analog pins, and can be powered by USB or an external power source.
6. Arduino Pro Mini: This is a smaller and more simplified version of the Uno, featuring an ATmega328P microcontroller and a reduced set of input/output pins. It has 14 digital pins, 8 analog pins, and can be powered by an external power source.
7. Arduino MKR1000: This board features a low-power WiFi module and is designed for Internet of Things (IoT) applications. It has 14 digital pins, 7 analog pins, and can be powered by USB or an external power source.
There are many other variants of Arduino boards available, each with its own specific set of features and capabilities. Choosing the right board depends on the specific requirements of your project, such as processing power, input/output pins, and connectivity options.