Arduino and the 4 digit 7 segment led display - Anything Arduino Ep 21 

Definitely better than most tutorials on RU-vid

Dude, you just saved me probably about an entire day of figuring this out. I'm making a clock with these.

Very nice tutorial, especially explaining that 12 pins of a 4 digit display are the same as those of 4 individual displays.

Love the video, the explanation was perfect, the speed was perfect, and you're easy to understand. Thank you for taking the time to teach this. Thumbs up!

Just a quick note, as I just did this and wanted to see how others also did it. It is better to turn all the digit pins all off before setting the next number's segments. Then set the segments you want before turning on that digit. You'll notice a faint 0 bleeding into digit 1, and a faint 1 into digit 2 etc. because you are turning on digit 1 before you set the segments for the 1, and the previous 0 segments are still on for a few microseconds!

Nice work. I was able to get the "dot" to light up and alternate between the digits. You never mentioned using Pin 3, and hooking it up to Arduino pin 13. Gave me something to figure out. Thanks for that. #learningArduinoIsFun

Thanks Kristian. I have watched a good few of your tutorials, and find them really helpful. You have a great way about you - your teaching method and personality is so relaxed and positive, it's really a pleasure to learn from you. It's great you are covering just the right topics and difficulty level for people like me, who are just getting past being total novices, but still need to grasp the basics. Keep going!!

Very well explained and simple to understand. This is my first working project with arduino. I am also going to repurpose it into a small digital clock. Thank you for the great tutorial.

Loved the video Kristian! Great help

"It switches very fast" you answered my question. Well explained thank you

Don't you need resistors too?

The code on your site is corrupt but I was able to figure out what is going on based on your training! You do man!

Dear Mr. Kristian, I saw so many videos on Arduino projects of different peoples but you are fabulous because of your presenting style, so easy and very different. I need your favor regarding one of your previous episode-4 (Temperature & Humidity Controller), from this episode i made an egg incubator by adding two more relays and also display (16X2 LCD). it is working very fine but for incubator we need different temp & humidity at different time, for that i need to add some buttons to change them directly without any editing with programming. Please make an episode with connection of episode-4 with addition of buttons & LCD/7-segment LED. I am waiting for your valuable response Thanks in advance

Just awesome. The video was so detailed. It was so easy for me to follow along because of how precise the video was. Thank you so much. Very greatly appreciated! P.S. I subbed!

Pretty nice tutorial. I'm trying to make a watch of this display using arduino and this video just gave me a pretty good start on how to work them. Thank you

/* Showing number 0-9 on a Common Anode 7-segment LED display Displays the numbers 0-9 on the display, with one second inbetween. A --- F | | B | G | --- E | | C | | --- D This example code is in the public domain. */ // Pin 2-8 is connected to the 7 segments of the display. int pinA = 2; int pinB = 3; int pinC = 4; int pinD = 5; int pinE = 6; int pinF = 7; int pinG = 8; int D1 = 9; int D2 = 10; int D3 = 11; int D4 = 12; // the setup routine runs once when you press reset: void setup() { // initialize the digital pins as outputs. pinMode(pinA, OUTPUT); pinMode(pinB, OUTPUT); pinMode(pinC, OUTPUT); pinMode(pinD, OUTPUT); pinMode(pinE, OUTPUT); pinMode(pinF, OUTPUT); pinMode(pinG, OUTPUT); pinMode(D1, OUTPUT); pinMode(D2, OUTPUT); pinMode(D3, OUTPUT); pinMode(D4, OUTPUT); } // the loop routine runs over and over again forever: void loop() { digitalWrite(D1, HIGH); digitalWrite(D2, LOW); digitalWrite(D3, LOW); digitalWrite(D4, LOW); //0 digitalWrite(pinA, LOW); digitalWrite(pinB, LOW); digitalWrite(pinC, LOW); digitalWrite(pinD, LOW); digitalWrite(pinE, LOW); digitalWrite(pinF, LOW); digitalWrite(pinG, HIGH); delay(1); // wait for a second digitalWrite(D1, LOW); digitalWrite(D2, HIGH); digitalWrite(D3, LOW); digitalWrite(D4, LOW); //1 digitalWrite(pinA, HIGH); digitalWrite(pinB, LOW); digitalWrite(pinC, LOW); digitalWrite(pinD, HIGH); digitalWrite(pinE, HIGH); digitalWrite(pinF, HIGH); digitalWrite(pinG, HIGH); delay(1); // wait for a second digitalWrite(D1, LOW); digitalWrite(D2, LOW); digitalWrite(D3, HIGH); digitalWrite(D4, LOW); //2 digitalWrite(pinA, LOW); digitalWrite(pinB, LOW); digitalWrite(pinC, HIGH); digitalWrite(pinD, LOW); digitalWrite(pinE, LOW); digitalWrite(pinF, HIGH); digitalWrite(pinG, LOW); delay(1); // wait for a second digitalWrite(D1, LOW); digitalWrite(D2, LOW); digitalWrite(D3, LOW); digitalWrite(D4, HIGH); //3 digitalWrite(pinA, LOW); digitalWrite(pinB, LOW); digitalWrite(pinC, LOW); digitalWrite(pinD, LOW); digitalWrite(pinE, HIGH); digitalWrite(pinF, HIGH); digitalWrite(pinG, LOW); delay(1); // wait for a second /* //4 digitalWrite(pinA, HIGH); digitalWrite(pinB, LOW); digitalWrite(pinC, LOW); digitalWrite(pinD, HIGH); digitalWrite(pinE, HIGH); digitalWrite(pinF, LOW); digitalWrite(pinG, LOW); delay(1000); // wait for a second //5 digitalWrite(pinA, LOW); digitalWrite(pinB, HIGH); digitalWrite(pinC, LOW); digitalWrite(pinD, LOW); digitalWrite(pinE, HIGH); digitalWrite(pinF, LOW); digitalWrite(pinG, LOW); delay(1000); // wait for a second //6 digitalWrite(pinA, LOW); digitalWrite(pinB, HIGH); digitalWrite(pinC, LOW); digitalWrite(pinD, LOW); digitalWrite(pinE, LOW); digitalWrite(pinF, LOW); digitalWrite(pinG, LOW); delay(1000); // wait for a second //7 digitalWrite(pinA, LOW); digitalWrite(pinB, LOW); digitalWrite(pinC, LOW); digitalWrite(pinD, HIGH); digitalWrite(pinE, HIGH); digitalWrite(pinF, HIGH); digitalWrite(pinG, HIGH); delay(1000); // wait for a second //8 digitalWrite(pinA, LOW); digitalWrite(pinB, LOW); digitalWrite(pinC, LOW); digitalWrite(pinD, LOW); digitalWrite(pinE, LOW); digitalWrite(pinF, LOW); digitalWrite(pinG, LOW); delay(1000); // wait for a second //9 digitalWrite(pinA, LOW); digitalWrite(pinB, LOW); digitalWrite(pinC, LOW); digitalWrite(pinD, HIGH); digitalWrite(pinE, HIGH); digitalWrite(pinF, LOW); digitalWrite(pinG, LOW); delay(1000); // wait for a second */ }

Great job!!!! You made it so easy for me to understand!! Thanks a lot for the video!!!

bro you teached me exactly what i am searching . thanks a lot bro . love from INDIA🇮🇳🇮🇳

Thanks. I am trying to make a video game device like a nintendo game and watch using arduino. I found this very helpful.

nice tutorial....... respect from INDIA

Also works with Atmel 2560 project

great vid! . .thanks - but why do you not use resistors before the LED?!

so nice!!! Fully watched!

Thanks so much sir... Such a nice tutorial... Respect from Bangladesh

This was a nice video explaining with pin configuration. Thumbs up !

I really liked the way you are making the things simpler but when I have done in the same manner as you showed in the video but it is not getting any output and from where is this 4 in 7 segment getting power as you have not connected any supply to it

Very nice work. Easy to understand. Thank you

Thank you for this tutorial.

i have a question, why don't you connect any current limiting resistor to the display. The arduino IO pin can only provide up to 20mA and i think a single digit take more current than that (given that all seven segment light up). That is just my personal question, love the great content and experiment that you showed to help us, keep it up mate !

Thanks for the informative video :)

Hello, Why you don't use resistors between segments and arduino?

3 digit 7-segment display circuit and how to connect it on the breadboard to count from 0 to 100

The one thing is missing to show how to display a variable which was generated as a result of some maths in code.

hello! this tutorial really helped me build! Is there a place where this code is posted? I wanna test it out with the clock

As always - great tutorials. if possible, i would like to see a simple two wheel robot tutorial with ultrasonic distance sensor, servo, DC motors, drivers etc. and to make things interesting, the robot should follow a line on the ground.I have seen some of them on youtube, but they all lack good explanation.

Thank you very much! What I needed!

You could just write one additional function like for example: PrintDigits(int value) to print given number on this display and forget rest ;)

Great tutorial, good to understand and helpful. Thanks very much!

found it extremely helpful in getting started , well explained thanks

For me, digitalWrite(D1, LOW) turns on the first digit, and pinA through pinF on HIGH turns those segments on while pinG on LOW turns it off. Not sure why mine are opposite.

How would i go about turning this into a digital clock? Yours is the closest i have come to understanding how to do this.

Kristian this video helped greatly, although I was wondering if you could assist by using this same code, but adding in a way to display numbers that are entered from the serial monitor?

So cool!! Thanks a lot!!!

Hello Kristian, Excellent videos, very informative and well presented. Question: I want to run six 4 x digit 7 segment displays (each with a resistor of course). Would I need to connect a separate power source so as not to overload the Arduino? If so what voltage would it need to be please?

Thanks!!!, you're a great teacher.

thanks for the video!!!

Do you need to use dupont wires or can you the normal wires?

Thank you!!! It worked

Do we need to also put capacitors for this display?

Great video, very helpful. :)

so good video. learnt someny things

Great explanation, thanks!

You'r helpful thanks

Thank you very much, a great explanation. you explain well.

8:00 ... got a little trippy for a second ;)

Sir can u make digital clock based on this I m facing difficulty in displaying hrs and minutes

Hola como puedo poner varios sensores de dht11 uno en cada habitación y sacar los gráficos

Thanks a lot friend, this video is great!

So now you have 12 output pins going into the clock? Does it not need to be connected to ground somehow? I mean it works. I just don't quite understand why. It doesn't look like a closed circuit to me. Why does the display not have a ground pin?

Hey great tutorial but I am having an issue with my board, I press upload code and there isn't any error but my board flashes yellow a few times then nothing happens on the led display EDIT: I fixed the problem, but now my display just has a static 9349 on it

Firstly, it's great tutorial. It's clear about the pins in 7 segment. I am working on a project. I had a similar 4 Digits Led Segment like yours. However, it's a module which uses 2 shift registers 74HC595. So, how should I write the code to make it runs? Thank you

this helped me a lot!! its awesome : )

Thanks for this!

When I use this tutorial my 'blacked out' segments (set to low) are still somewhat (very slightly) illuminated. Would using a 220 resistor in someway on the pin set up help to make them completely blacked out?

THX for nice video I had no problem when doing EP7 for 1digit, but I get all reversed output on 4digit I think it's matter of cathode and anode So, should I have to fix all the codes from HIGH to LOW, LOW to HIGH? is there any way to fix it more efficiently?

Man, you're legend....wait for it....dary!

How can this unit display constant voltage output? x.xx from the other breadboard. example in Paul McWhorter's episode 9. he uses a multimeter but couldn't you just send the data to the display unit?

Hi, im trying to finish my project but im having trouble in my codes. How can i make the zero remain in the 1st tube after looping and so o , until it goes back to the first one and loop again? Thank you

Hello Kristian, how do i turn on the decimal point on the 4 digits 7 Segment Led. I have troubles doing that. Hope to hear from you!

Good work friend ❤😉👍👏👏👏👏👏subscribed Brazil

Hey Kristian!!!PLease help me with the code.The code Shows only 0.It does not counts to the next digit.I have used 4 individual 7 segment LED's .And I have Commom Anode Type LED Segment.Please do provide me with the code.Please.

Thanks man

Good fundamentals.

hello ! how would you program a 7 segement 2 digit display??

CAN YOU HELP? I HAVE A 4 SEGMENT CLOCK MODULE THAT HAS 3O WIRES ON THE BOTTOM AND AM HAVING PROBLEM GETTING PINOUT OFIT.

Why is it that I have to flip all the high and low around to match what is being shown in tutorial? I have a Elegoo Mega2560 board.

why I am getting this message 'D1' was not declared in this scope. i have done same thing.

hey can you help me with interfacing 4x4 keypad and 4 digit 7 segment ? on arduino

I have searched in other youtube videos but only now I figured out how to work with 7 segment display arduino. I have also a problem, I want to work with lcd 16x2 display , I have wired up , but its not showing text , I don't know how to make it work. Do you have any tutorial about 16x2 display too?

can you build a counter with the MAX7219 chip?

Where are your current-limiting resistors? Why are you connecting this display directly to Arduino outputs without resistors?

i dont get it, a led requires an anode and cathode, but digital pins output only one type. It doesn't work for me

Please can you make a video how to send text from android app using wifi module with 7 segment display

Why did you not include a resistor? My 7-segment display needs resistors

what could the issue be if the numbers don't fully lit up? please help

i'm new to arduino. why is there no ground pin?

My display is not doing anything. I've dissemble it several times. Code is compiling fine. There is no power going to the display at all.

I have tried this code in wokwi online simulator instead of using real hardware, in simulation I can't able to get the all the 4 digits correctly displayed simultaneously, what's the reason, can anyone tell ? Whether we get this only if we tried in hardware?

What is the white board for and where do i conect the wires on their. IS their anyway to include a rotary knob to change the digits

Can I use such a display without a resistors?

Felt like I was being taught by Floki from Vikings! :D

Thank you! :)

Thank you for this! Subscribing

How can one combat the issue with ghosting? I mean, "1" has the "0"'s afterglow because of the Arduino not switching segments fast enough

GREAT job, can you help me to connect the 3 digit 7 segment led

hi there can you help me about my 4 digit segment LED 5604 module. all I want is counter upto 0 t0 99.99

Really thank you

you are a Godsend

thank you

My LED is on when High and off when Low