Arduino Atto is a small-sized, low-powered microcontroller board designed for use in small-scale projects and prototypes designed by Nionics. It is based on the ATmega32U4 microcontroller and has 12 digital input/output pins, as well as 4 analog input pins and a reset button.
Arduino Atto boards are compatible with the Arduino programming environment, making them easy to use for beginners. They are often used in projects that require a small form factor or low power consumption, such as wearable technology or remote sensors.
Features
- Dimension0.40″ x 0.45″ (10.3 mm x 11.5 mm)
- Weight0.04 oz (0.68 g)
- MicrocontrollerATmega32U4
- Operating Voltage3.3 V
- Input Voltage4 – 13 V
- Digital I/O Pins12 + 3 (RGB LED)
- PWM Channels4 + 3 (RGB LED)
- Analog Input Channels 4
- Interface USB, SPI, I2C (TWI), ISP
- Peripherals Reset button, RGB (rainbow) LED
- Bootloader Arduino Leonardo
- Flash Memory32 KB (ATmega32U4) of which 4 KB is used by the bootloader
- SRAM2.5 KB (ATmega32U4)
- EEPROM1 KB (ATmega32U4)
- Clock Speed16 MHz
- Pin Pitch0.05″ (1.27 mm)
Pros
- Very small size
- Suitable for prototype wearable devices like smartwatches
Cons
- Pin incompatible with breadboard
- Board manufacturing quality doesn’t look good in photos
Pinout Diagram
Size Comparison
Comparing the dimensions of Arduino ATTO to Arduino UNO, Arduino Nano, and Seeed Studio XIAO
