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A breakout board for easier connectivity
It is commonly used in applications where arithmetic operations are involved
all pins have interrupt/pwm/I2C/one-wire supported(except D0)
A5: Analog output
Arduino Leonardo R3 Photo Interrupter A breakout board for easierIntroduction : 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 an AC to DC adapter or battery to
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