![]() ![]() DC Power Barrel Jack – This is used for powering your Arduino with a power supply.Voltage Regulator – This controls the amount of voltage going into the Arduino board.Power LED Indicator – This LED lights up anytime the board is plugged in a power source.ATmega Microcontroller – This is the brains and is where the programs are stored.TX/RX – Transmit and receive data indication LEDs.USB Connection – Used for powering up your Arduino and uploading sketches.PWM – The pins marked with the (~) symbol can simulate analog output.Digital Input/Output – Pins 0-13 can be used for digital input or output.Ground Pin – There are a few ground pins on the Arduino and they all work the same.AREF – Stands for “Analog Reference” and is used to set an external reference voltage.Reset Button – This will restart any code that is loaded to the Arduino board.Here is a quick Arduino UNO board layout refresher(image courtesy of ) ![]()
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