March 2017
Beginner to intermediate
422 pages
8h 4m
English
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Connecting the 74HC595N shift register to control many LEDs
So far, we've been controlling LEDs with individual GPIO pins. Not only is this a rather inefficient use of the Raspberry Pi Zero GPIO, but even if we used every single available pin for an LED, that would be a pretty boring light show. Instead, by adding in an LED driver such as the inexpensive 74HC595N, you easily get the ability to leverage several LEDs, or multiple 4x7-segment-number displays. In this recipe, we will use the SPI interface to control an eight-LED array. Let's get cooking!
Getting ready
Here is what you'll need for this recipe. At this point, you should be able to improvise with LED options. I used the 74HC595N, which is a commonly available chip online and also included ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.