The Zero is a simple and powerful 32-bit extension of the platform established by the UNO. The Zero board expands the family by providing increased performance, enabling a variety of project opportunities for devices, and acts as a great educational tool for learning about 32-bit application development.  The Zero applications span from smart IoT devices, wearable technology, high-tech automation, to crazy robotics. The board is powered by Atmel’s SAMD21 MCU, which features a 32-bit ARM® Cortex® M0+ core. One of its most important features is Atmel’s Embedded Debugger (EDBG), which provides a full debug interface without the need for additional hardware, significantly increasing the ease-of-use for software debugging. EDBG also supports a virtual COM port that can be used for device and bootloader programming.

Warning: Unlike most Arduino boards, the Zero runs at 3.3V. The maximum voltage that the I/O pins can tolerate is 3.3V. Applying voltages higher than 3.3V to any I/O pin could damage the board.

The board contains everything needed to support the microcontroller; simply connect it to a computer with a micro-USB cable or power it with a AC-to-DC adapter or battery to get started. The Zero is compatible with all the shields that work at 3.3V and are compliant with the 1.0 Arduino pinout.

Key specifications:

• Microcontroller: ATSAMD21G18, 32-Bit ARM Cortex M0+
• Operating Voltage: 3.3V
• Digital I/O Pins: 20
• PWM Pins: All but pins 2 and 7
• UART: 2 (Native and Programming)
• Analog Input Pins: 6, 12-bit ADC channels
• Analog Output Pins: 1, 10-bit DAC
• External Interrupts: All pins except pin 4
• DC Current per I/O Pin: 7 mA
• Flash Memory: 256 KB
• SRAM: 32 KB
• EEPROM: None
• Clock Speed: 48 MHz
• 70.3mm x 53.5mm x 12.7mm / 2.76" x 2.1" x 0.5"
• Weight: 22.6g