74HC595 & 74HC165 Shift Registers with Arduino

[@manofmesopotamia7602]

this gentleman is so generous in giving knowledge, I wish him the best in all (health, long life, fortune, good wife, and more important to stay progressed) >>>> big hug to you from Iraq 🌹

[@BurnerStudio]

yup, agree with you :D

[@muesli4597]

Can you be more specific regarding the "good" wife please?

[@manofmesopotamia7602]

@@muesli4597 I was expressing best wishes for him basing on my country best wishes to good people. In Iraq, one of good wishes to a friend is to wish him have a good wife to support and live with her happily 😉

[@muesli4597]

Did you consider peoples sexual preferences before jumping to a conclusion?

[@hamzahaytham3940]

@@muesli4597 Dude can you stop talking please

[@anthonyschroeder3611]

I just want to say that I began my electrical career as a electrical technician by starting out with tinkering with microcontrollers, namely Arduinos. I learned the basics from Drone Bot Workshop and carried the knowledge I learned from it to other fields and through these events impressed my current employer to land a job straight out of community college. Thank you so much for all you do. I will be donating to show my gratitude and appreciation :) I encourage anyone else who understands how valuable and rare it is to find material like the one DBW provides.

[@tubeDude48]

Bill *ALWAYS* has a way of presenting video's in a very logical way. And he presents a wide range of projects!

[@jimlthor]

Thank you! I've seen multiple videos saying "this is what a shift register does" but never showed how to actually use it

[@nickrobitsch2929]

I have found the Bob Ross of Electronics. Subscribed.

[@YippeePlopFork]

Hey Bill! I needed a good tutorial for my daughter (she's learning digital electronics) and this was my go-to for shift registers. Great video and thank you for presenting this subject in such a way that it is easy to understand for complete beginners!

[@jmspaceR]

You are amazing! For me, you are the Andrew Huberman of electronics. There is nobody out there that conveys the information needed to create your own schematics more concisely than you.

[@BryanByTheSea]

Another incredible tutorial video. The level of detail and explanation you provide in these tutorials is amazing. Thanks so much

[@stevetobias4890]

Thank you for the time you give people like myself who are looking to improve their skills with Arduino projects. Your an amazing teacher and I wish you the best in all aspects of life. I love how you explain everything in a normal calm voice unlike others who speak so fast or don't explain in the detail you do. Thanks again

[@startobytes]

Hi, I have used this Sketch to make my own 8 by 8 LED Matrix with 1 74hc595 and I am also just 14 years old, thank you a Lot!

[@casemotube]

You, Sir, have opened the doors to my better understanding of Arduino and bitwise logic, and I thank you sincerely. I'm 62-years-old and discovered the Arduino playground in early January of 2020, and I'm hooked (it's my new hobby). After using the 74HC595 in an early LED display project, I began to study the nuts-and-bolts of the unit, and I find this all fascinating. For those interested in the logic-level workings of the 74HC595 (or any other chips, for that matter), here are a few references that I've discovered along the way that can be used by both beginners and advanced coders alike. For those who aren't familiar with bitwise operations and boolean algebra, don't let the big words fool you; it's as simple as yes or no, on or off, zero or one...just forget about the world of 0s and 9s, and shift into the world of 0x0 through 0xf (hex numbers), and 0b0 through 0b1 (binary numbers (all two of them)). Once I started coding with hex and binary numbers back in 1990, I never looked back. Mentally converting hex numbers into binary numbers and vice versa is simple, once you learn the trick. I've C & Ped a copy of comments I wrote for a 74HC595 bit-shifting LED project I wrote. I'll share the code on the DroneBot Workshop as soon as I can. When I code, I comment a lot; I comment on the comments if need be. // Forward: The 74HC595 is a SIPO (Serial In, Parallel Out) shift register used to store eight bits of serial data, // and to produce eight bits of parallel outputs. There are two data registers inside the 74HC595: // // 1) the SHIFT register, used to store the serial data inputs ([shift: 1] shifted-in by the shift clock, via the data pin) // 2) the STORAGE register, which stores the parallel output data shifted-in from the SHIFT register ([shift: 2] by the latch clock, internal). // // In review: the "shift clock" shifts data into the SHIFT register, and after eight bits are shifted into the // SHIFT register, the "latch clock" shifts the data stored FROM the SHIFT register INTO the STORAGE register, // which produces the eight bits of outputs. (lol I'm not screaming; just making a point.) // // The 74HC595 is mainly utilized to reduce the amount of output pins needed to use from the microcontroller board // (the Arduino UNO board, in this case). Using three pins from the microcontroller board, the 74HC595 provides // eight output pins in a state of either on or off at 5vDC or 0vDC (and no, you can't PWM through the 74HC595). // // The 74HC595 contains 8-sets of master/slave flip-flop logic circuits running on an operating voltage range of 2vDC // to 6vDC (the logic runs at the data-input voltage level), 80μA (maximum draw), and is the coolest little gadget to // entertain one's self with. The more I learn, the more I realize how simple this device really is. When I begin // programming FPGAs (soon), one of my first goals is to create an operational bit shifter. I'm lovin' it! // // There are three states that the parallel output can be set to: ON, OFF, and high impedance. High impedance // blocks any data shifts (and is toggled by the OE (with a bar above the OE) pin). If you want inputs/outputs // turned off? Simply set the OE pin HIGH, otherwise, it defaults to LOW. The shift register can also be directly // overridden and cleared by setting the SRCLR (with a bar above the SRCLR) pin LOW, otherwise, it defaults to HIGH. // // The best reference I've found for the 74HC595 is: lastminuteengineers.com/74hc595-shift-register-arduino-tutorial/ // They do a great job of explaining the internal operations of the 74HC595 shift register in simple terms.

[@casemotube]

And yes, the previous post was premature. I meant to say more with additional links, but the main jist of the idea came through. It's probably not appropriate, but here's the entire .ino file. It doesn't read as well here, but C & P it into the Arduino IDE; play around, have some fun. //øøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøø// //øøøøø[ Begin: Global variables ]]øøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøø// #include // a library of functions for using flash memory and stuff. #define OP_SPEED 0x64 // used to set the speed at which the 74HC595 is updated #define ARRAYSIZE 0xf0 // used to define the size of the dataArray[] and to end loop iterations const int dataPin = SDA; // Arduino UNO digital SDA pin connected to the DS pin of the 74HC595 shift register (Serial data input) const int clockPin = SCL; // Arduino UNO digital SCL pin connected to the SH_CP of the 74HC595 shift register (SHIFT clock pin) const int latchPin = SCK; // Arduino UNO digital SCK pin (a.k.a. pin 13) connected to the ST_CP of the 74HC595 shift register (STORAGE register clock pin (latch pin)) const byte dataArray[ ARRAYSIZE ] PROGMEM = { // the data array: binary data stored in flash memory used as switches to turn LEDs on and off. B10000000, B01000000, B00100000, B00010000, B00001000, B00000100, B00000010, B00000001, B00000001, B00000010, B00000100, B00001000, B00010000, B00100000, B01000000, B10000000, B10000000, B01000000, B00100000, B00010000, B00001000, B00000100, B00000010, B00000001, B00000001, B00000010, B00000100, B00001000, B00010000, B00100000, B01000000, B10000000, B10000000, B11000000, B11100000, B11110000, B11111000, B11111100, B11111110, B11111111, B11111111, B11111110, B11111100, B11111000, B11110000, B11100000, B11000000, B10000000, B10000000, B11000000, B11100000, B11110000, B11111000, B11111100, B11111110, B11111111, B11111111, B11111110, B11111100, B11111000, B11110000, B11100000, B11000000, B10000000, B00000001, B00000011, B00000111, B00001111, B00011111, B00111111, B01111111, B11111111, B11111111, B01111111, B00111111, B00011111, B00001111, B00000111, B00000011, B00000001, B00000001, B00000011, B00000111, B00001111, B00011111, B00111111, B01111111, B11111111, B11111111, B01111111, B00111111, B00011111, B00001111, B00000111, B00000011, B00000001, B00000001, B00000011, B00000111, B00001111, B00011111, B00111111, B01111111, B11111111, B11111111, B01111111, B00111111, B00011111, B00001111, B00000111, B00000011, B00000001, B11111111, B11111111, B11111111, B11111111, B00000000, B00000000, B00000000, B00000000, B11111111, B11111111, B11111111, B11111111, B00000000, B00000000, B00000000, B00000000, B11111111, B11111111, B11111111, B11111111, B00000000, B00000000, B00000000, B00000000, B11111111, B11111111, B11111111, B11111111, B00000000, B00000000, B00000000, B00000000, B11000011, B11000011, B11000011, B11000011, B00111100, B00111100, B00111100, B00111100, B11000011, B11000011, B11000011, B11000011, B00111100, B00111100, B00111100, B00111100, B11000011, B11000011, B11000011, B11000011, B00111100, B00111100, B00111100, B00111100, B11000011, B11000011, B11000011, B11000011, B00111100, B00111100, B00111100, B00111100, B11001100, B11001100, B00110011, B00110011, B11001100, B11001100, B00110011, B00110011, B11001100, B11001100, B00110011, B00110011, B11001100, B11001100, B00110011, B00110011, B11001100, B11001100, B00110011, B00110011, B11001100, B11001100, B00110011, B00110011, B11001100, B11001100, B00110011, B00110011, B11001100, B11001100, B00110011, B00110011, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, B01010101, B10101010, }; //øøøøø[ End: Global variables ]øøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøø// //øøøøø[ Begin: setup() function ]øøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøø// void setup() { pinMode( clockPin, OUTPUT ); // init the clockPin to output pinMode( latchPin, OUTPUT ); // init the latchPin to output pinMode( dataPin, OUTPUT ); // init the dataPin to output } //øøøøø[ End: setup() function ]øøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøø// //øøøøø[ Begin: loop() function ]øøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøøø// void loop() { byte *buf_p; // a pointer to the dataArray[] memory address at the time we're reading the data // begin outer for() loop - this loop pushes the data from the 74HC595's SHIFT register into its STORAGE register for ( int thisByte = 0x00; // declare an index for the data array starting at zero thisByte

[@casemotube]

CORRECTION: you actually can PWM through the 74HC595 using the OE pin with analogWrite() commands. I got in front of myself on that one; my bad.

[@ricouxstephane1628]

A video that illustrates in a great way some articles on the Net I had to read when I had to deal with shift registers for my project. I wish you had published this before : clear, informative and now, 74H* are not magic to me anymore! Great examples too!!

[@eebaker699]

Thank you Bill! Just what I was looking for. I was lurking around on your forum site and found this in a topic discussion. Your forum website is great! Keep up with the good work.

[@scruffy0mogwai]

Great video! Simple and straight forward. I feel I have a better grasp on these than I have ever had.

[@AX3904P]

I am an amateur electronics enthusiast, i'm a Noob, i will have to re-watch this a few times, great video by the way.

[@janet-tx8cj]

Fabulous video and detailed explanation. Not only explaining what shift registers are and their benefits, but also a practical example of how they can be used in the real world (or workshop). Thank you very much.

[@wardprocter2371]

This is one of the best explanation and tutorials on logic gates I have come across. The examples you’ve created showcase their use very well. Great work and worth the wait! Thank-you! Now I’m off to order some logic chips to play with.

[@DeeGeeDeFi]

Getting a few resistor array dips. Fiddling with individual resistors is for the birds.

[@chrisfoot6680]

I really don't get why this guy hasn't more subs. Your one of the best content creators on KZbin!

[@hannescamitz8575]

Probably because he's too specific and slow in his way of explaining his projects, this requires a mind-set that accept this type of videos. People these days are stressed and can't put themselves to listen to him for 30-40min about how you get some LED to blink, they just want the fancy product, not the "boring" side of it. I get calm when listen too teachers and or people like this man or Ben Eater (probably butchered him surname...)

[@ronaldronald8819]

Excellent! I needed to read the states of several pir and magnetic switch sensors while also controlling lights. Shift registers fit this problem like a glove.

[@siddiqjr4660]

i just cant get enough of watching your videos , you among a few who i take as my reference to learn a new skill , so thank you very much

[@XanCraft21]

This video really helped me. Now my 5x5 led display project can be upgraded to have everything on one board. Thank you!

[@atfchannel3425]

I'm from Iraq .. your videos are very excellent. And very useful. Thank you very very much.. I wish for you the best 🌹❤

[@johnbuckley2506]

Thanks so much for another excellent video. I'm one of the people who asked for this subject and thrilled to see you listen to us - thanks!

[@guidovlaere]

Thanks for all the great support for my hobby! Very good tutorials! Thanks very much for all your work!

[@louco2]

Thank you so much for taking the time to do these videos!

[@KidChemic]

your videos are becoming top notch and quickly my favorite on youtube, keep it coming!

[@BarackBananabama]

When you talk about SIPO and PISO, you may use branched and directional arrows to illstrate their jobs in a visual manner.

[@noweare1]

Very useful tutorial, thank you for the work you put in on this. I did get confused when the clock enable pin was used as the clock and the clock pin was used as the enable. I got the data sheet and sure enough it said those pins are interchangeable. I like the way you taught how the byte was complemented to get it back to what it really represented.

[@gmonkman]

Really good video, you take the time to explain, and you speak at just the right pace for me to process what is going on. Great to see practical use rather than all just flop flop theory!

[@benjaminrich9396]

Great videos. Very well structured. Also, being genuine here, serious respect to a guy whose slight speech impediment means he pronounces 'sh' as a kind of 'slzch' having the word workSHop in his title and doing a video on SHift registers. :)

[@vonries]

Another great video as usual. I haven't seen or heard anything about DB1 in a very long time. I never expected you to do one a week plus one a week of the component level videos as you had once proposed. That's just to much work! I was however hoping you were going to do a DB1 video every other time. I was not planning on building one right now, but was so intrigued by your concept I needed more. I take it that you were not getting enough interest from other viewers to keep it going? That's really ashame. That looked like it was going to be something really special. I would love to see you bring it back to life.

[@fletchercunningham1364]

Where do the values of the drop in resistor and filter capacitor come from at 9:49? I assume that Ohm’s Law has something to do with it but what would that math look like?

[@Enigma758]

16:57, I think it's important to keep total current in mind since if you were to wire up two 7 segment displays using 150ohm resistors (mentioned as a possible value earlier), then you would exceed the 200ma limit of the arduino (e.g. 20ma/LED x 16 segments is 320ma).

[@333cgs333]

Hi Enigma, so I have to connect 20-40 leds. Is there a better choice?

[@Enigma758]

@@333cgs333 Connect them in parallel, each with their own current limiting resistor. Calculate the current through each LED and total it for all LEDs. Use an external power supply which can provide the correct amound of current (always best to provide more current than required so you won't damage/overheat the supply). Be sure to have a common ground between the arduino and you external supply. You can also search youtube for videos on powering LEDs.

[@SegasonicfanDesigns]

Superb!! Your image / write up on your website was even better. Very grateful to you :)

[@mandelbro777]

Another amazing video. Thank you kindly for putting this together, it will simplify a very important and useful process in digital electronics for the amateur/enthusiast.

[@charlesmarlin6632]

Purchased on Amazon and tested (Worked Great) these Jameco Valuepro 4116R-1-331LF. Bussed Resistor Network, 16 Pin, 125 mWatt, 330 Ohm, 2% Tolerance ... Great Video!!

[@90simissthe]

heck ya, anytime im lookin for a refresher on something i find your videos.

[@bartgroothengel7594]

Very good explanation.Soothing voice,nice to listen,.Very calm.You got an arduino-fan subscribed!!

[@startobytes]

Hi, I have used this Sketch to make my own 8 by 8 LED Matrix with 1 74hc595 and I am also just 14 years old, thank you a Lot!

[@modx5534]

Excuse me, but how did you manage to drive 64 Leds with just the eight outputs of one 74hc595?

[@digihz_data]

Don't forget to tie pin 9 from the HC165 to ground! This was missing in the video.

[@crisselectronicprojects8408]

Excellent tutorial! Good job man!

[@startobytes]

Hi, have used this Sketch to make my own 8 by 8 LED Matrix with 1 74hc595 and I am also just 14 years old!

[@sheldonlarson3711]

Very much appreciated! You are making a difference in this world!

[@damaruinc]

Synchronicity: A day before this video came out, I was trying to figure out how I could use, say, n outputs from an Arduino to drive, say, 2^n LEDs. I'm very new to electronics and microcontrollers, but I've been doing software development professionally for several years. I love this circuit because it does exactly what I was trying to solve, the circuits in the IC aren't hard to understand, and it's great I can just buy an IC instead of wiring all that stuff together. In software development we have libraries of pre-defined stuff, just as ICs are packages of functionality. So ICs follow the same principle we do: package and make freely available bunches of commonly used functionality.

[@thisisanevilcorp992]

Hope systemd or other models of development don't reach this area...

[@mannhansen9337]

Shift registers are often unknown by hobbyists and forgotten by others. I have seen them in a lot of designs since the 70's. Computers, wending machines and as receiver/decoders in military radar equipment. You find them very cheap on Ebay. Try to get hold of the good old Texas TTL Handbook.There are many fun and interesting chips in the 74 series.Even an ALU.

[@parulpari7346]

Such detailed and easy content is rare

[@bob-ny6kn]

I kept using eight resistors for these shift register projects, so I cheaped out and stuck them in a DIP socket. Works okay.

[@seaofcuriosity]

Best ever explanation ... Love from INDIA

[@TRONMAGNUM2099]

You really are a wealth of knowledge.

[@wackojacko1997]

This was great education and demonstration. Thank you!!!!

[@modx5534]

Great video! After some initial problems due to my own stupidity (forgot that the same rows on the breadboard are connected ^^..) I got my example to work. Finally I understood how to work with SIPO shift registers and I can't wait to use multiple ones in order to drive more LEDs.

[@yamageki4152]

GOD explanation. trashes those of difficult web explanations by words.

[@RDKCREATIONS]

i have a doubt , do we need exactly 8 buttons or leds for this projects

[@caffeinatedinsanity2324]

Great tutorial. I used these for controlling a board of 8 active low opto-isolated relays, in conjunction with a library I made specifically for this setup. Basically, shift registers act like gateways.

[@manojithalder7448]

Thanks for your in-depth explanation.

[@darthdaenerys]

Sir,can u plz tell me why did u connected the capacitor ?? What would be the difference if i won't connect it🙏🙏

[@roscianyt]

From the datasheet: "Each VCC pin should have a good bypass capacitor to prevent power disturbance. For devices with a single supply, 0.1 μf is recommended; if there are multiple VCC pins, then 0.01 μf or 0.022 μf is recommended for each power pin. It is acceptable to parallel multiple bypass caps to reject different frequencies of noise. A 0.1 μf and a1 μf are commonly used in parallel. The bypass capacitor should be installed as close to the power pin as possible for best results."

[@scottinharwood]

Hi, I watched this video and said to myself, that's a cool sketch, so I set up the hardware same as yours for the shift register. Then I modified it so that the LEDs would shift from outside to inside and back then repeat. Now, as I was moving the breadboard around while the LEDs were flashing back and forth, the positive 5Vdc from the Arduino connection came out of its pin on the Arduino Uno; and the LEDs still flash as if power is applied to the chip. I have a 150ms delay between LED shifts as follows in the below code segment (this repeats for different binary numbers for the flashing effect): int latchPin=11; int clockPin=9; int dataPin=12; int dt=150; byte LED1s=0b10000001; byte LED2s=0b01000010; byte LED3s=0b00100100; byte LED4s=0b00011000; byte LED5s=0b00100100; byte LED6s=0b01000010; byte LED7s=0b10000001; byte LED8s=0b00000000; . . . void loop() { // put your main code here, to run repeatedly: digitalWrite(latchPin,LOW); shiftOut(dataPin,clockPin,LSBFIRST,LED1s); digitalWrite(latchPin,HIGH); delay(dt); digitalWrite(latchPin,LOW); shiftOut(dataPin,clockPin,LSBFIRST,LED2s); digitalWrite(latchPin,HIGH); . . . From my multimeter, pin 11, the latch pin, varies a bit but averages to about 4.93Vdc and seems to be supplying all the power the chip and LEDs require to keep running. I would love to send you a picture or short video so you could see this and maybe repeat it. Scott in Harwood, MD

[@willibaldkothgassner4383]

perfect explanation ... Thanks from Vienna/Austria

[@abuhafss1]

Love all your videos and really appreciate your detailed explanations. Just one thing, I would like to request is that you should zoom in the Arduino Code screen so that the words are readable even on smaller devices.

[@ralfw7463]

I'm a complete novice when it comes to basic electronics. I was searching for PISO without knowing it. Thinking it must be named differently because I associated shift registers solely with SIPO functionality. Thanks so much for enlightening me!

[@jss6404]

I studied a lot. Thank you for teaching me properly.^^ It was very helpful and useful.

[@moacirg]

Parabéns por falar um Inglês pausado e fácil de entender. Isso facilita muito para quem não tem o inglês como língua nativa.

[@RastaJediX]

Can you explain the complimentary output but again? Why would you not get all 8 bits if you used the non-inverting output?

[@KshitijBhatnagar]

What is name of Ohm register you used?

[@KentHervey]

Thank you very much. I plan to use this for my ESP32 C Lang development

[@mesafirstkids]

I am working on a led matrix, 8x16, and I’m trying to figure out if I need a shift register or an led driver.

[@XJ290]

Quick question, AT 11:34, did you forget to define the numberToDisplay variable? I am doing the 8 LED project and it won’t run without it. I’m setting it equal to 0 to start and assume it will continue to count up, I’ll edit this comment depending on how it goes. Thanks for the video 👍 Edit: I figured it out. I was being sloppy and somehow put a semicolon in the for() statement and that caused the issue.

[@guidovlaere]

Bedankt

[@Dronebotworkshop]

Thank you Guido!

[@qzorn4440]

Geee... a great coffee shop video... Aaah, with some Irish-coffee i can watch most anything...:] and this shift is register wonderful stuff... makes me think of the heath-kit days. thaanks a lot...:)

[@yasserghozy6815]

Very interresting video I didn't think shift register are so useful

[@gustavoescuderocanalantigu1491]

Hi, I do not understand why the clock and the latch should be analog outputs while the data input digital. I would appreciate help with this!

[@raksmeipenh]

Dear Sir, would you explain more about how to wire two 74hc165 together? and are there any changes in code? thz in advance!

[@НикитаИванов-н5ю]

А можно ли как-то обойтись без delayMicroseconds? В серьезных проектах это парализует многозадачность, от него просто необходимо избавляться, какой бы он длительностью не был этот delay...

[@angelsosa4189]

Your videos are really very informative. It would be interesting in adding a part "B" to this video and connect all 8 data pins to the 1602 LCD. This way a hardware contrast can be made from from a software perspective and a hardware perspective between 4 bit mode and 8 bit mode on the LCD?

[@bubbatt77]

coolest thing ever. great explanation.

[@GeorgMierau]

I've got a Kingbright 7-segment display (SC56-11SRWA) and had to switch the outputs 1 and 2 of my 74HC595 to make your code work properly.

[@imanguha5244]

Nice! You can also use 7 segment display to demonstrate the operation of this IC.

[@salvadorkda5758]

I'm an amateur learning electronics, and when seeing schematics like 16:51 this one I always wonder : is not more simply put only one or two resistors at the pin 10 and 16 ? Why the reason to put a single resistor on each output? Is it because of the voltage of the chip? good practice? Or have a good reason I'm missing? Thanks in advance :D

[@MartinScherpa]

If you don't limit the outputs on a chip, although they have limited current output, if you don't use any dropping resistors, you won't limit the current of the chip, and it will burn or even worse, damage your ic because of forcing it to provide more current than what is capable of You don't put resistors at the the vcc or gnd pins because that will limit the maxium corrent that will enter on the circuit For example, you put a resistor and now your circuit has a maxium of 200mA, if you have more than 4 outputs that provide 50mA each, as the voltaje won't go up, the current will drop to compensate. At least that's what i understand, i may be wrong, if i am please correct me

[@klong4128]

Very good presentàtion of shift register sipo/piso and Arduino programming . If you can use Ar/Vr/Mr for demo ,it will be excellent .Good job done !!

[@haijohemminga5334]

Nice example of Shift Registers, but what is component serial# of the 8 resistors in DIP package ?

[@charlesmarlin6632]

I am curious about the 8 resistor DIP items as well? ... Great Video!! Learned a lot and ordered some 74HC165 and 74HC595 and would also like to order some of the 8 resistor DIP.

[@charlesmarlin6632]

Purchased on Amazon and tested (Worked Great) these Jameco Valuepro 4116R-1-331LF. Bussed Resistor Network, 16 Pin, 125 mWatt, 330 Ohm, 2% Tolerance ... Great Video!!

[@Gitago]

Great walkthru, I was wondering how many volts should the 100mf electronic capacitor be, and how necessary is it to have? also running into an issue where 'all' the leds are blinking at once.. not sure what I may have done wrong.

[@varungurav8521]

30:22 can we store the data(1010100) in char array???

[@parulpari7346]

You deserve more than you get!

[@shanthalalliyanage2943]

The first sketch in this video when uploaded to the PC an error message appears which says"numberToDisplay was not declared in this scope". I am new to this subject. Please help me to get it right.

[@mattiaiezzi9381]

Hi. Is it possible to share the clock pin between the two ICs?

[@sebastiank686]

i really like his tutorials

[@Dancopymus]

Excellent class! Any link to this Resistor Array (global)? I just didn't understand the order of the pins from the 7th segment display to the shift register, 74HC595, for example, because it seems that there is a 7th segment display that doesn't follow an order. Thanks for the video.

[@spyder000069]

One issue with using the 74HC165 for input buttons would be polling and catching a button press in time without blocking the rest of the code versus running a on change interrupt. How do people handle that? Poll in a timer interrupt?

[@MartinScherpa]

the arduino has inbuilt timer which can be used as interruption timers, which when the interruption occurs, you can run whatever you want inside another function, i think it was ISR(Timer_interrupt) or something like that There you can put the code to receive the inputs, which shouldn't be more than some nanoseconds

[@electronic7979]

Very helpful information

[@omniyambot9876]

does the shift register ic requires a 5 volts that i can't just put a resistor to its power supply or supply it with 3 volts to avoid using many resistors? or the current would not be enough? thanks. sorry I'm idiot.

[@omniyambot9876]

or to put a low resistance resistor to common ground of led?

[@okoeroo]

Crystal clear explanation, thanks!

[@gohan3243]

how can I control individual leds in a 4 cascaded C595 registers. for example 2^31 value will light up only led 32. thanks

[@JaneDoe-bq9sw]

Which 220 ohm resistor array do you use? I am blind and that sounds like an awesome component to have. I think it will help me in cleaning of the board and making it less problematic for the elegoo Super starter kit that I have.

[@mberglof]

Have a look at ULN2803A, cdn.sparkfun.com/datasheets/Components/General%20IC/uln2803a.pdf

[@charmindesai3730]

@@mberglof We are looking for resistor network, and not what you recommended :)

[@ancelb9590]

Just ran into an unusual issue with a batch of Nexperia 74HC595 units which the Fairchild version does not exhibit. Turns out that pin 11 (shift reg. clk)suffers 'ringing' that's tough to quantify as any Oscope probe capacitance is enough to stop it. A wet finger capacitance on the pin makes it work fine. My solution ended up being a 470Ω inline with pin 11 to defeat the ringing resonance. I was running it with a 5V PIC 16F886 MCU. Threw away a few 'bad' Nexperia chips b4 I figured out the issue so I could use them.

[@chbonnici]

Thank you for your excellent presentation. Well done keep it up.

[@unavailibleshark]

How fast will the 74hc165 read inputs? I was looking to maybe try to use multiple hc sr04's to read the echo's on interrupt pins, but looking at your led's in the video looked a bit slow probably due to the delay at the end

[@cschmitz]

Ultra helpful. Thanks for the vid!!

[@markcollard9326]

Do you have a longer intro video with a longer song? I tend to spontaneously bust out into a robotic dance every time your videos start due to the catchy retro 8-bit style tune and it is contagious.

[@brassmonkey0300]

why do i always break shift registers making a troubleshooting nightmare. do i need to keep a static wristband on at all times?

[@bilbobaggins138]

How do you do if you need to use several 165 registers? I can't find any code examples

[@luberies]

Bill, Thank you for your always marvelous videos!

[@s1mplelance964]

Thank u so much for this clear explaination!