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Arduino BLINK Blueprints by Utsav Shah, Samarth Shah

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"Hello World"

You must be aware of "Hello World" programs from computer science, where you write a piece of code which will display "Hello World". In electronics hardware board space, "Hello World" refers to blinking an LED by writing a simple program.

The resistor will block the flow of current in both directions. A diode is a two-terminal electronics component that has low resistance in one direction and high resistance in the other direction. Diodes are mostly made up of silicon. LEDs are the most commonly used diodes in any electronics circuit. LED stands for light emitting diode, so it emits light when sufficient voltage is provided across the LED anode and cathode.

The longer lead of the LED is the anode and the other end is the cathode. The ...

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