Schematic Arduino Uno Pin Diagram. Pins 0 13 of the arduino uno serve as digital input output pins. Input voltage to arduino when using an external power source.
A serial clock pin uses scl and a serial data sda sda pin. Vin 3 3v 5v gnd. Micro nano mega leonardo 101.
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Arduino uno pinout digital pins. The arduino uno is arguably the most popular arduino board currently available. Scl it stands for serial clock. Pins 0 13 of the arduino uno serve as digital input output pins.
