May 2016
Intermediate to advanced
388 pages
9h 9m
English
Content preview from Internet of Things with PythonBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Using PWM plus a RESTful API to set colors for an RGB LED
Now, we will use the same source code to make it possible to change the color of an RGB LED, specifically, a common cathode RGB LED. This electronic component provides a common cathode and three anodes, that is, an anode for each of the three colors: red, green and blue. We can use our code to pulse width modulate the three colors and make the LED produce the mixed colors. We don't need to use a black surface to see the intersection of the three colors because the RGB LED mixes the three colors for us.
The following image shows a common cathode RGB LED with one of the most common configurations for the pins, where the common cathode is the second pin and the longest one.
The following table ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.