Arduino Leonardo is the latest low-cost Arduino controller of Arduino team .<br />It has 20 digital inputs and outputs， seven PWM port and 12 analog inputs.<br />Leonardo uses a single-chip solution.<br />Atmega32u4 original ecological support USB feature also allows Leonardo modeled as a mouse and keyboard，<br />Use Arduino Leonardo requires a new version of Arduino IDE1.01 above.<br />Development board size: 6.9 * 5.3cm<br />USB cable length: 80cm<br /><br />Specifications<br /><br />? Controller: ATmega32u4<br />? Work Product Catalog: 16 MHz<br />? Operating voltage: 5V<br />? The input voltage (recommended): 7-12V<br />? Digital IO ports: 22 (D0-D13， D14-MISO， D15-SCK， D16-MOSI， D18-23 [A0-A5])<br />? PWM channel: 7 (D3， D5， D6， D9， D10， D11， D13)<br />? Analog inputs: 12 (A0-A5， D4-A6， D6-A7， D8-A8， D9-A9， D10-A10， D12-A11)<br />? 5V digital / analog port maximum allowable current: 40 mA<br />? 3.3V digital / analog port maximum allowable current: 50 mA<br />? Flash Memory: 32 KB (ATmega32u4) of which 4 KB used by bootloader<br />? SRAM: 2.5 KB (ATmega32u4)<br />? EEPROM: 1 KB (ATmega32u4<br /><br />Arduino Leonardo R3 development board * 1<br />USB cable * 1<br />Static bag package<br /><img src="http://img6.eachbuyer.com/x9/p100/eb4333_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb4333_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb4333_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb4333_4.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb4333_5.jpg" />