This is usually used when you have for example, an LED and a 9 volt battery. A Resistor (Image 4): The resistor limits the amount of electrical current that is flowing to your next component it's connected to. Breadboard Wires (Image 3): Breadboard wires (also called jumper cables) are used to transfer electricity through 2 points or components in your circuit. However, this can also be used to prototype a circuit without making it permanent and move you components to a real circuit board later on so that it is permanent. A Breadboard (Image 2): This is usually what you would use if you're trying to interconnect components together to make a functional circuit. By far the most commonly used Arduino would be the Arduino Uno in my opinion. There are also different types of Arduino boards from the orginal all the way to the Arduino Mega a or the Arduino Nano. An Arduino Board (Image 1): An Arduino is essentially the brains of your circuit and accepts various inputs of code to run a function or whatever you programmed it to do. Let's start with the more commonly used ones first. If you are new to Arduino it's important to understand what each component does so that you know what situation to use a certain component for what you want to accomplish.
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