![]() These handy devices are used for all sorts of purposes like data conversion, buffering and storage, but today we will be seeing how they can also be used to expand the number of digital I/O ports on an Arduino or other microcontrollers.īy learning to use shift registers you’ll be adding another handy tool to your designers’ toolkit. Today we will work with a couple of basic electronics “building blocks”, shift registers. And, as a bonus, we’ll build a fancy LED light display. I’ve got a few shifty characters with me today but don’t worry, I’ll show you how to control them and expand the capabilities of your Arduino. 8 Using the 74HC595 and 74HC165 Together.4.2 74HC165 – 8-bit Parallel In – Serial Out.4.1 74HC595 – 8-bit Serial In – Parallel Out.3.1.3 Parallel In – Parallel Out & Serial In – Serial Out.
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