#11 Arduino and LED 7-segment displays using a MAX7219 – Part 3

Part 3. (Watch Parts 1 & 2 first). The coder strikes back!

7-segment LED displays are easy to control with an Arduino and a MAX7219 – just 3 wires (plus power supply) and a few lines of simple C++ code.

You don’t need to be a rocket scientist to display the numbers 0 thru 9 (and the letters HELP) on a 7-segment LED display unit. So you can display the temperature or distance or… you get the idea!

It’s simple so just watch this and follow me through the steps.

Parts 1 & 2 (videos #9 & #10) precedes this one. Subscribe so you don’t miss out.

Part 3 (this video, video #11) looks at good coding techniques to make your code robust and easy to maintain.

All code, the MAX7219 library and other stuff can be found here:

And my channel is here:

How can I remember this? Memory tip: “See” Ralph Bacon, geddit?

Nguồn: https://sunview.vn

Xem thêm bài viết khác: https://sunview.vn/cong-nghe/

9 thoughts on “#11 Arduino and LED 7-segment displays using a MAX7219 – Part 3

  1. Ralph, when you had the long code, you used CBDE7219, but when you cleaned it up, you used C8DE7219, which spells H8LP1275, just a typo. But great video, thanks. Please do one on how to take a variable number and put the digits into the code so the numbers are displayed. Thanks

  2. Hi Ralph, thanks for all of your great videos. Hopefully there'll be many more to come!……
    I've been looking through your 7 segment display videos, again, in the hope of discovering the source of the black acetate sheets you once used – if my memory serves!?!?
    I am finding great difficulty in locating some to put over my 7 segment displays….
    Can you throw some light on this, please!?

  3. I have been doing electronic projects for more than 20 years as a hobby, but I never had the courage to go into processors and coding. You made me grab my arduino, blow the dust on it, and write a code for the first time. And it worked! I even downloaded the library for MAX7219 and tried some other codes too. I think I will like this. Thank you for your time and simple explanations, you've got one more subscriber.

  4. Sir here you have one library for that chip. It will be awesome if you make one video explaining how to use it. Keep it up with awesome videos. Good luck.
    http://wayoda.github.io/LedControl/pages/software.html

  5. Thanks for the great tutorials Ralph! I have subscribed to your channel and look forward to watch more videos. I have made a prototype with the 7-segment display and the code you explain works great. I have a question though, how can I make it display a number stored in a variable? For example, if making a counter with a button, and showing the increasing number on the display.

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