![]() If you look closely at your resistor you'll notice some color bands. If you are curious how this works you can check out our LED tutorial to see how to properly size a resistor. This resistor minimizes the current that gets to your LED so we don't give the LED too much current and destroy it. The resistor is like a tube that restricts the amount of current that can get through. Batteries are basically our power house that stores power and outputs that power in terms of current (how fast the electrons are moving) and the voltage (the amount of pressure pushing those electrons through the circuit). Starting with the positive end of the battery, you can see the path it takes along the left side of our PCB up to the resistor. Current is how we measure the flow of those electrons. Consider the battery our source of electrons. So, what does our circuit do? A completed circuit is a path where electrons can flow. ![]() Share on Twitter Share on Facebook Pin It Flashlight Circuit The Circuit
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