Arduino
Arduino Leonardo development board - Arduino Leonardo, ATMega32u4, 16
The Arduino Leonardo is a microcontroller board based on the ATmega32u4. It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. The Leonardo differs from all preceding boards in that the ATmega32u4 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. Processor Microcontroller model: ATMega32u4 Microcontroller frequency: 16 MHz Memory Flash memory: 0.032 MB SRAM (Static Random Access Memory): 2.5 KB EEPROM (Electrically Erasable Programmable Read-Only Memory): 1 KB Ports & interfaces Wi-Fi: No Ethernet LAN: No USB ports quantity: 1 Number of digital I/O pins: 20 Number of analog I/O pins: 12 PWM digital I/O pins: 7 Weight & dimensions Board dimensions: 53.3 x 68.6 mm Power DC input voltage: 7-12 V Operating voltage: 5 V Input voltage (max): 6 - 20 V DC current per I/O pin: 40 mA Features Form factor: ArduinoVis mere
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