![]() Each pin works at 5V and may provide or receive up to 20mA of current. The 14 digital input/output pins can function as both input and output pins. To provide reference voltage for input voltage. Used to receive and transmit TTL serial data.ġ0 (SS), 11 (MOSI), 12 (MISO) and 13 (SCK) 3.3V: 3.3V supply generated by the onboard voltage regulator. The maximum current draw is 50mA. 5V: Regulated power supply used to power microcontroller and other components on the board. Vin: Input voltage to Arduino when using an external power source. ![]() The Arduino Uno contains 14 digital I/O pins (six of which can be used as PWM outputs), six analog I/O pins, a USB connection, a power barrel jack, an ICSP header, and a reset button. It includes other components to support the microcontroller, such as a crystal oscillator, serial communication, a voltage regulator, and so on. In case of any doubts feel free to contact us by email or phone.Today, I'm going to give you an overview of the Difference between Arduino Uno and Arduino Leonardo.Īrduino Uno is a microcontroller board based on an 8-bit ATmega328P microcontroller.
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