September 2016
Intermediate to advanced
495 pages
9h 37m
English
book
Arduino: Building exciting LED based projects and espionage devices
by Adith Jagdish Boloor, Samarth Shah, Utsav Shah, Marco Schwartz
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LED fading
You can fade out and fade in the light of an LED using Arduino's analogWrite(pin, value) function. Before we get into using the analogWrite() function, we will understand the concept behind the analogWrite() function. To create an analog signal, Arduino uses a technique called Pulse width modulation (PWM).
Pulse width modulation (PWM)
PWM is a technique for getting an analog signal using digital means. By varying the duty cycle (duty cycle is the percentage of a period, when a signal is active.), we can mimic an "average" analog voltage. As you can see in the following image, when we want medium voltage, we will keep the duty cycle as 50%. Similarly, if we want to achieve low voltage and high voltage, we will keep the duty cycle as 10% ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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