Arduino ShiftOut() - Friday Minis 206

On Wednesday, we looked at the 74HC595N Shift Register, writing our own code to transfer data to it. I briefly alluded to the shiftOut function which can be used to make things simpler. In this episode of Friday Minis, we take a closer look at the shiftOut function and see just what makes it so interesting!
= CREDITS =
My appreciation extends to the creators of the following external assets that made this video possible:
Blown Away by Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
creativecommons...
ISRC: USUAN1200100
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[@HiddenG14]

I like this.

[@theunime9836]

what actually happens in a bitset() or bitWrite() function...plzz explain

[@NERDfirst]

Hello and thank you for your comment! The bitSet() and bitWrite() functions are *bit manipulation* functions. On a computer, numbers are represented by a string of bits, and these two functions are used to manipulate individual bits. bitSet(x,n) means to set the nth bit of the integer x to 1. bitWrite(x,n,b) means to set the nth bit of integer x to b. For a crash course on this subject, check out this video of mine → kzbin.info/www/bejne/aoLPpGash6aSfJY If you prefer to take your time and go in-depth, I have a playlist of 4 videos going through this → kzbin.info/aero/PLJse9iV6ReqgcI4tec2jcyOZkaUKuGoHN

[@theunime9836]

0612 TV w/ NERDfirst thanku... That was indeed a help... Great job...

[@NERDfirst]

You're welcome! Happy to be of help =)

[@sauravti]

OooooooooooooooooooooooooAwesomeeeeeee!!!!!!!

[@NERDfirst]

Hello and thank you for your comment! Glad you liked the video =)

[@colinjava8447]

Thanks for video, I'm new to arduino but I understand binary to a high level. I have the 8 bit shift register, and 8 leds, and I'm using the code: for(int n=0;n

[@NERDfirst]

Hello and thank you for your comment! No, it doesn't use shift operations. The role of this function is to connect to something like a shift register, to serially "push" 8 bits of information out over one data line. It "signals" a new "push" by pulsing a clock line.

[@colinjava8447]

@@NERDfirst ok why is it called a shift register, I would think it has something to do with binary shifting

[@NERDfirst]

It is called that because information is "shifted" bit by bit into the internal storage of the shift register. You are essentially shifting 8 bits of information over one data line by doing it over a period of time instead of all at once.

[@erdenekhuujargal2939]

hello can you leave the link. how did you build shifout function?

[@NERDfirst]

Hello and thank you for your comment! I did not build the shiftout function, it's already available within the Arduino IDE!

[@daisym6503]

Sir, I'm currently using 24 LEDs and 3 shift registers. When I enter the value 1 to the data argument for the ShiftOut function, the first LED connected to each shift register lights up. Then, when I give the value 255, all 24 LEDs gets lit. Is it normal behaviour ? Would you please tell me how to only lit up 1 LED from a single shift register ? Thank you

[@NERDfirst]

Hello and thank you for your comment! It sounds like your three registers are sharing the same data pin as well. What happens then is that each register is operating separately from each other but are reacting to the same set of instructions. Right now, in your setup each chip probably has one pin unused. That pin serves to "forward" the last bit from one register to the next (refer to the datasheet for more). What you want to do is to link that pin to the data pin of the "next" register.

[@daisym6503]

Hi, There is no unused pin except 9th pin of the last shift register. When I use someone's code(without shiftout function) it works perfectly. My code: shiftOut(11,12,MSBFIRST,B00000001); Thank you.

[@NERDfirst]

Then I'm afraid I don't really have enough information to advise further. Everything sounds correct. Perhaps review where you're calling your function and what values you're passing in.

[@daisym6503]

Thank you sir. I will try.

[@distortedfocus7698]

Thank you for explaining absolutely nothing

[@NERDfirst]

Hello and thank you very much for your comment! I'm sorry you've had a bad experience. What, in your opinion, was missing from this episode? How could it be improved?