Arduino Tutorial 42: Understanding How to Use a Serial to Parallel Shift Register (74HC595)

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In this lesson we show you how to use the 74HC595 Serial to Parallel Shift Register with the Arduino. A Serial to Parallel converter allows you to use just a few pins on the Arduino, and control a much larger number of devices. This is important when you are running out of pins on the Arduino. We take you through the build and programming step by step.

You can get the kit I am using for this series at the following link:

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#Arduino

[ricardocarmona]

Pual, we will never hate you for taking your time in your own code and hardware. We all appreciate you taking time out of your day to create these very helpful videos!

[preetamsingh]

In my opinion, there isn't any better course for Arduino on internet than yours. Following along good - humored Grand Pa!

[jstro-hobbytech]

You've grown on me so much that I feel like we're buddies. You're a great educator as well, they are few and far between.

[dennisrhodessr]

Loved the video, I learned a ton from it. I am trying to make a traffic light system for my model train. I made it using a 12 outputs on the Ardunio Mega, and it worked fine. After watching your video I only use three outputs and two 74HC595 IC and it works great!!!. Love your stuff!, keep them coming. I am a 66 year old retired trucker just starting to learn this stuff.

[JohnB-rc]

HATE is not ANYTHING that ever comes to mind when following and performing and learning from you Sir!! And when I initially hooked up my circuit, all LED's came on, wondered what I had done wrong. traced everything and all was correct, then continued watching and was laughing (not at you but with you).

[EduTechNeer]

Dear Sir. I know it has been a while since you posted these tutorials but I have just got started in the past few weeks picking this up. I really appreciate that you explain the little details that so many other tutorials gloss over. You are a true teacher sir and thank you.

[mauriciojurin]

This Serial to Parallel shift register is amazing. 41 and 42 have been my favorite so far. Great to learn why we need binary and HEX systems. Makes me kick myself for not going for my BS in EE instead of getting it in IE. I guess that as long as I'm on the right side of the grass it's never to late.

[neomaxmaya]

Anyone could learn this stuff, but not anyone can teach like you! Great job indeed!

[niteshram]

sir I watch your video in loops ...your truly like a Grandpa to me...helping and making me learn new things.☺

[MrSikkandar]

sir please teach us ESP32, no one can teach better than you, please, please, please, all others just want to show off their skills, but you are the only one who teach us something worthfully

[sumantakumardutta]

The circuit building was really tedious. But, the beautiful result at the end was worth it. ❤

[laxmanrao]

Every second of the video has something to learn from. Thank you Paul for theee epic, theee greatest arduino tutorials !

[j.davidslaugh]

This is awesome I am just getting involved with this stuff. When I was young chase lights at the theater always intrigued me but looking at them long enough you could see just on and off (back and fourth) between two lights.
I set up 8 LEDs byte's and started with the first and moved thru the entire 8 one at a time from left to right. A perfect chase no back and fourth blinky. LOL

[necoisidois]

Adamsın Dostum.. Harika bir iş çıkarmışsın. Bir yıldır bu bilgiye ulaşmaya çalışıyordum..

[MrBrotherchris]

This was actually one of my favorites. I made the counter and watched it counting. The rhythm of blinking lights was mesmerizing.

[genericuser]

Be careful when choosing the resistor value when powering 8 LEDs via a shift register. If all the LEDs are illuminated at once, such as with certain chase patterns, you don't want to exceed the maximum limit of the shift register's power pin (I don't know off-hand, perhaps 50mA or 70mA??). When simulated in TinkerCad, <=330 ohm resistors will result in shift register failure, when all LEDs illuminate simultaneously.

[TheParksy]

Done the homework before the end of this video

[anandvishwakarma]

I wish you Happy New Year Sir 🛍.
you and your family.
I hope we will see your private video soon.👍👍

[Японскийшагзашагом]

Assignment is completed! Thank you so much. 🎉🎉🎉

[zachhamersley]

Let the haters hate. Troubleshooting is a crucial part of the learning process. I had issues too, ended up having a bad jumper on the ground and a loose connection on one of my 5volt jumpers at the same time. Methodical and calm troubleshooting process saved the day! Thanks Paul.