How to use 4-digit LED TM1637 display with Arduino

[@agahgokdag1845]

You explained the lesson like a "white swan" dancing on the lake,thank you Sir...

[@rollover36]

I liked the way you showed each running piece of code while running the test, good work sir, ty

[@marios_ideas]

Thanks:)

[@maxdre433]

frckin loved that you did an understandable example in the end

[@marios_ideas]

Glad you found it helpful:)

[@Eurus721]

Best video on this display I’ve ever seen. Helped so much being able to see the code as the program was running. Thanks for so much effort into this very useful video.

[@marios_ideas]

You are too kind;) Consider supporting my channel

[@elektron2kim666]

My first one didn't light up and I'm stuck. Now I have a test board for those and a good app. The micro controller is like a TTL interface with GPS (taking time data out) and I could use it for the u-blox software. My Cardputer is more fancy with this and I can type through it and get a clock on that display. My little oscilloscope show that the signals are fine, so I will buy a few more TM1637 modules to see what happens.

[@SebaSpeed]

Very good tutorial, thanks bud!!

[@marios_ideas]

Thanks:)

[@u1kim]

Thanks for the tutorial. Even after two years since this tutorial, there's still no definitive reference I can find on TM1637 on Arduino, and this video is about the only piece that shows the placement of decimal point. However, I'm still struggling with formatting floating point numbers with specific decimal point placement. For instance, how would you write the parameters to display four digit number with one of them after the DP? e.g. displaying a variable named data with a value of 123.4?

[@jeffbeck6501]

It was so good, the video that is, that I had to subscribe. Great job man.

[@marios_ideas]

Thx. Also give video a like to help to promote it:)

[@selimcanovur587]

Hello, I could not trust most of the products, some seems like dots are available but actually not connected physically to the module. Can you suggest me a product with the decimal points, which I can drive with tm1637 ? Because I wrote my own library for raspberry pi and everything works fine except the decimal points. Some of the products work like a timing module even though they have decimal segments.

[@marios_ideas]

I can't. The one I used in the video was purchased in the large selection of components. And If I need to use this display stick to this one:) Find a local electronic shop , not the online shop. If this is not what is advertised you can simply return it.

[@anokhautomation4453]

Useful tutorial.thanks for sharing.

[@marios_ideas]

Thanks.

[@passibharat]

Very good explanation

[@marios_ideas]

Give video a like if you enjoyed it:) Helps me a lot. I also have some OLED display tutorials you may find useful

[@abdulqadirahmedli610]

Çox sağ olun. Mənə InşəAllah kömək etdi.

[@marios_ideas]

Thanks:)

[@lolleepop]

How to make the display show the variable. Im making a distance measuring system and I want to display the output number to this type of displays. Plz help

[@marios_ideas]

I have one video where I am working displaying time on this display. Please check how I displayed variable there kzbin.info/www/bejne/mKO3n3h7f6d5kK8

[@chbonnici]

Very nicer thank you.

[@marios_ideas]

Thx:)Give video a like if you enjoyed it. It helps to grow my channel

[@Ktos1]

Dobra robota, filmik mi bardzo pomógł, szkoda że nie robisz drugiej wersji po polsku.

[@marios_ideas]

Super ze sie podoba:)

[@grzegorzbrzeczyszczykiewic2089]

Po polsku ?

[@magnetservicecenter]

sir i am layman since age 33,now i am 43 but you are Gineous

[@marios_ideas]

Naaaaa:)

[@knerduno5942]

So I ordered two of these, and not from Alixpress as I did not want to wait 1-6 months for delivery. First one i got, I realized after does not have decimals between the numbers. I had to remove the in your code for the display to show numbers correctly. The other one does have decimals, and is similar to the larger one you have here, even with similar markings. Not only is it not displaying decimals, it is only showing a single 0. Advice on that?

[@marios_ideas]

I am afraid it would be difficult for me to support here. Maybe you have some other type that does not work well with that library. Displaying just a zero when you clearly attempt to display a different content is not a good sign

[@knerduno5942]

@@marios_ideas Okay. I will give the other libraries I try. Thanks!

[@brotherdevastro393]

can i change the 7 segment to 2.3 inch seven segment with 7Volt Supply?

[@marios_ideas]

Inspect the part and it has a microchip TM1637 on it then you can. So you power from 7 v but connect 5v logic from arduino to the signal pins to control it.

[@eligijuspranskunas3509]

on the code compiler it says- has no member "clear"

[@marios_ideas]

Arduino nano or uno has only 2k of ram. Easy to go over the limit. You were adding your own code , I presume

[@coroomchannel414]

How to display numbers with commas? For example 27.30.

[@marios_ideas]

Answer is in the video. Check timestamp 6:05. There I am displaying all the dots. There is a fourloop there using k variable. But instead of using k you can use either 3,2,1,or 0 and it will display one of the dots

[@coroomchannel414]

@@marios_ideas How to display 3 temperature numbers on seven segment?

[@lamse_barmajiyye]

How can we use this module with micro c?

[@marios_ideas]

I have not looked at Micro C and PIC microcontrollers. Sorry

[@lamse_barmajiyye]

@@marios_ideas OK thank you

[@MrAlinkarl]

nice video! can u make a video a countdown timer if there is a input signal ex. sensor and give time to countdown. thanks.....

[@marios_ideas]

I am not sure I understand. CAnyou explain more

[@MrAlinkarl]

@@marios_ideas if the arduino detect input sensor, then it will give time ( ex. 30 minutes) it will countdown and it will display the minutes and sec., and zero comes it will end and stay zero display. thanks for the rply

[@marios_ideas]

Well this is a very specific request not really good for dedicated video. What I might do in the future is to do a stopwatch and eggtimer which should give you good idea how this would work. But I do not have this project in my immediate pipeline. In a meantime you can look at the other video of mine which shows how to display time. If you can do it then all you need to do is to detect the sensor state change and record time and then show 30:00Min on the display and come up with formula which calculate the amount of time that has passed since we recorded the timestamp and substract it from 30 min. Should not be very difficult

[@PiyushRobotics]

amazing

[@marios_ideas]

Glad you think so!

[@safadelican]

THANKS

[@marios_ideas]

My pleasure

[@user-xb5zu6zu7j]

How did you fix dot issue?

[@marios_ideas]

By using clock.showNumberDecEx((int)myRTC.hours/10*1000+(myRTC.hours-((int)myRTC.hours/10)*10)*100+ (int)myRTC.minutes/10*10+myRTC.minutes-((int)myRTC.minutes/10)*10, (0x80 >> 1), true); In that command (0x80 >> 1) is responsible for displaying the colon. Mind you you have to have a specific TM1637 display. There ones meant for displaying decimal numbers and they have dots and there are ones for displaying time with colons. There some that have both but then you have to experiment with different libraries. My experience is that I use either dots or columns depending on display type. I have separate video on TM1637 where this is covered

[@andrasparanici5491]

Nice!

[@marios_ideas]

Thanks:)

[@yuvrajsingh8901]

Can u help me

[@Sekhar_Home]

I want to control tm1638 without library.. is it possible. If yes then pls make a video or give me link where to get tutorial. Thank u in advance

[@marios_ideas]

I am not sure. I will check. Why would you want not to use the library?

[@SebaSpeed]

Obviously is possible but you need more code to send each bite to controller to make changes,

[@Sekhar_Home]

@@SebaSpeed pls tell me where to follow any tutorials

[@SebaSpeed]

@@Sekhar_Home I not know any tutorial but you can start studying the datasheet and make inverse engineering to the libraries.

[@knerduno5942]

Just look at the code in the library. That is what Object Orientated Programming is all about: the reuse of code.

[@sirchannel1754]

your video is amazingg sirrrr, goodjob can this tm1637 do the running text? if that possible can you show me the code :D

[@marios_ideas]

Well. You have a limited number of characters. Displaying what text did you have in mind?

[@sunilkb144]

is all alphabets displayable .especially z,k,m,r,t,w,x,

[@marios_ideas]

Nope . You cant e.g make z or m or x etc

[@mikethelittletrader2790]

If anyone is interested, here is my test code for this display to work without any library. #define CLK 2 #define DIO 3 /* * 0 - * 5 | | 1 * 6 - 7 : only at 2nd register * 4 | | 2 * 3 - * */ #define chA 0b01110111 #define chH 0b01110110 #define chO 0b00111111 #define chJ 0b00011110 #define chBlank 0 const byte nums[] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F}; byte bfr[5]; void setup() { Serial.begin(57600); pinMode(CLK, OUTPUT); // CLK pinMode(DIO, OUTPUT); // DIO digitalWrite(DIO, HIGH); digitalWrite(CLK, HIGH); } void loop() { SetBrightness(0); WriteLCD(chA, chH, chO, chJ, false); delay(2000); SetBrightness(2); WriteLCD(nums[0], nums[1], nums[2], nums[3], false); delay(2000); SetBrightness(4); WriteLCD(nums[4], nums[5], nums[6], nums[7], true); delay(2000); SetBrightness(6); WriteLCD(chBlank, nums[8], nums[9], chBlank, false); delay(2000); } void SetBrightness(byte level) // value 0 .. 7; { bfr[0] = 0b10001000 | (level & 0x07); // Display ON + jas SendMsg(1); } void WriteLCD(byte D0, byte D1, byte D2, byte D3, bool colon) { bfr[0] = 0b01000000; // command: write data to display SendMsg(1); bfr[0] = 0b11000000; // command: address C0H bfr[1] = D0; bfr[2] = D1 | (colon ? 0x80 : 0); bfr[3] = D2; bfr[4] = D3; SendMsg(5); } void SendMsg(byte byteCount) { int tmpBfr = 0; pinMode(DIO, OUTPUT); digitalWrite(DIO, LOW); // start digitalWrite(CLK, LOW); // clk ready for (int i = 0; i> 1; } digitalWrite(DIO, LOW); pinMode(DIO, INPUT); // waiting for ACK digitalWrite(CLK, HIGH); // test for LOW - not implemented digitalWrite(CLK, LOW); } pinMode(DIO, OUTPUT); digitalWrite(CLK, HIGH); // clk ready digitalWrite(DIO, HIGH); // end }

[@marios_ideas]

Wooo... this code is a little over my head:) I wił have to thoroughly analyse it. Thanks for your feedback

[@janmatlas]

Perfektní, děkuji! Použil jsem do programu pro řízení sušičky.