Arduino products include development boards, Modules, Shields, and Kits. There is mainly four-category on Arduino Development Boards. The categories are Entry Level, Enhanced Features, Internet of Things and Wearables. Generally used Arduino development boards and Different types of Arduino Boards are as below.
Entry Level Boards:
Uno, Leonardo, 101, Esplora, Micro, Nano, Mini, MKR2UNO
Enhanced Features Boards:
Mega 2560, Zero, Due, MKR ZERO, Mega ADK, Motor Shield, USB Host Shield, Relay Shield, Arduino ISP, Mini USB Adapter
Internet of Things Boards:
Yun, Ethernet, MKR1000, Yun Mini, Yun Shield, Wireless SD Shield, Ethernet Shield, GSM Shield
Wearable Boards:
Gemma, LilyPad Simple, LilyPad Main, LilyPad USB, LilyPad SimpleSnap
Comparison of Arduino Boards
Below given table shows Comparison or Different types of Arduino Boards
| Name | Processor | Operating/Input Voltage |
CPU Speed | Analog In/Out | Digital IO/PWM |
| Uno | ATmega328P | 5 V / 7-12 V | 16 MHz | 6/0 | 14/6 |
| 101 | Intel® Curie | 3.3 V/ 7-12V | 32MHz | 6/0 | 14/4 |
| Gemma | ATtiny85 | 3.3 V / 4-16 V | 8 MHz | 1/0 | 3/2 |
| LilyPad | ATmega168V ATmega328P |
2.7-5.5 V / 2.7-5.5 V |
8MHz | 6/0 | 14/6 |
| LilyPad SimpleSnap | ATmega328P | 2.7-5.5 V / 2.7-5.5 V |
8 MHz | 4/0 | 9/4 |
| LilyPad USB | ATmega32U4 | 3.3 V / 3.8-5 V | 8 MHz | 4/0 | 9/4 |
| Mega 2560 | ATmega2560 | 5 V / 7-12 V | 16 MHz | 16/0 | 54/15 |
| Micro | ATmega32U4 | 5 V / 7-12 V | 16 MHz | 12/0 | 20/7 |
| MKR1000 | SAMD21 Cortex-M0+ | 3.3 V/ 5V | 48MHz | 7/1 | 8/4 |
| Pro | ATmega168 ATmega328P |
3.3 V / 3.35-12 V 5 V / 5-12 V |
8 MHz 16 MHz |
6/0 | 14/6 |
| Pro Mini | ATmega328P | 3.3 V / 3.35-12 V 5 V / 5-12 V |
8 MHz 16 MHz |
6/0 | 14/6 |
| Zero | ATSAMD21G18 | 3.3 V / 7-12 V | 48 MHz | 6/1 | 14/10 |
| Due | ATSAM3X8E | 3.3 V / 7-12 V | 84 MHz | 12/2 | 54/12 |
| Esplora | ATmega32U4 | 5 V / 7-12 V | 16 MHz | – | – |
| Ethernet | ATmega328P | 5 V / 7-12 V | 16 MHz | 6/0 | 14/4 |
| Leonardo | ATmega32U4 | 5 V / 7-12 V | 16 MHz | 12/0 | 20/7 |
| Mega ADK | ATmega2560 | 5 V / 7-12 V | 16 MHz | 16/0 | 54/15 |
| Mini | ATmega328P | 5 V / 7-9 V | 16 MHz | 8/0 | 14/6 |
| Nano | ATmega168 ATmega328P |
5 V / 7-9 V | 16 MHz | 8/0 | 14/6 |
| Yùn | ATmega32U4 AR9331 Linux |
5 V | 16 MHz 400MHz |
12/0 | 20/7 |
| Arduino Robot | ATmega32u4 | 5 V | 16 MHz | 6/0 | 20/6 |
| MKRZero | SAMD21 Cortex-M0+ 32bit low power ARM MCU |
3.3 V | 48 MHz | 7 (ADC 8/10/12 bit)/1 (DAC 10 bit) |
22/12 |