Arduino Leonardo compatible development board with headers. Based on the ATmega32u4 microcontroller. It 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 adaptor or battery to get started.
The Leonardo differs from preceding boards in that iATmega32u4 t has built-in USB communication, eliminating the need for a secondary processor. This allows the Leonardo to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port.
Features| Operating Voltage | 5V |
| Input Voltage (Recommended) | 7-12V |
| Input Voltage (Limits) | 6-20V max. (power adaptor not included) |
| Microcontroller | ATmega32u4 |
| PWM Channels | 7 |
| Analogue Channels | 12 |
| Digital I/O Pins | 20 (7 of which provide PWM output) |
| DC Current per I/O Pin | 40 mA |
| DC Current for 3.3 V Pin | 50 mA |
| Flash Memory | 32 KB (ATmega32u4) of which 4KB used by bootloader |
| SRAM | 2.5 KB (ATmega32u4) |
| EEPROM | 1 KB (ATmega32u4) |
| Clock Speed | 16 MHz |
| Length | 68.6 mm |
| Width | 53.3 mm |
| Weight | 20 g |
