Fading

This example demonstrates the use of analog output (Pulse Width Modulation (PWM)) to fade an LED. PWM is a technique for getting an analog-like behavior from a digital output by switching it off and on very fast and with different ratio between on and off time.

Step 1: What You Need?

1 x Arduino Board (Arduino UNO used in this tutorial)
1 x LED (Red)
1 x 220 Ohm Resistor 
1 x Mini Breadboard

Male-to-Male Jumper Wires 

Don't have components? Don't worry. Just click the component's name. 

Step 2: Build Your Circuit.

An LED connected to digital output pin 9 through a 220 ohm resistor.

Step 3: Upload The Code.

1. Select the Arduino board type: Select Tools >> Board >> Select your correct Arduino board used.

2. Find the port number by accessing device manager on Windows. See the section Port (COM&LPT) and look for an open port named "Arduino Uno (COMxx)". If you are using a different board, you will find a name accordingly. What matters is the xx in COMxx part. In my case, it's COM3. So my port number is 3.

Select the right port: Tools >> Port >> Select the port number.

3. You can find this code in the example of Arduino IDE.
Select File >> Examples >> 03.Analog >> Fading

Click press the "upload" button (see the button with right arrow mark).

Download: 

Arduino software




Sources:https://www.arduino.cc/en/Tutorial/Fading

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Author & Editor

My Robot Education Sdn. Bhd. (Robotedu.my) was founded in 2015 as the first robotics education centre in Malaysia to provide Arduino-based robotics courses for youths. Our vision is to be able to provide robotics education to every youth in Malaysia.