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 Light-Emitting Diode (LED) Figure 1 : A Light-Emitting Diode (LED) A Light Emitting Diode – or LED for short – is a small component that lights up when current flows through it. Sometimes you use it for simple tasks like indicating that your circuit has power, that the circuit is working or that the circuit has failed. But you can also combine several LEDs to create simple 7-segment displays that can display numbers or use them to make cool light decorations. If you combine enough LEDs in a square, you can even use them to show images. The LED exist in many different colors ; Red, green, blue and many more. There is also a special type of LED called RGB. This is an LED where a red, green and blue LED has been combined into one package. The colors mix, so by controlling the intensity of each of the three colors you can create a wide spectrum of different colors. Figure 2 : The symbol used in circuit diagrams for a Light-Emitting Diode (LED) Example To use an LED, you need to connect it

#Basic Electronic Components Used in Circuits These are the most common components:     Resistors     Capacitors     LED s     Transistors     Inductors     Integrated Circuits   Resistor -Resistor- I didn’t understand the resistor in the beginning. It didn’t seem to do anything! It was just there, consuming power. But with time, I learned that the resistor is extremely useful. You’ll see resistors everywhere. And as the name suggests, they resist the current. But you are probably wondering: What do I use it for? You use the resistor to control the voltages and the currents in your circuit. How? By using Ohm’s law. Let’s say you have a 9V battery and you want to turn on a Light-Emitting Diode (LED). If you connect the battery directly to the LED, Lots of currents will flow through the LED! Much more than the LED can handle. So the LED will become very hot and burn out after a short amount of time. But – if you put a resistor in series with the LED, you can control how much current is g

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