Difference between revisions of "7 Segment LED Display Modules"
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[[File:4 Digit Display.jpg|400px]] | [[File:4 Digit Display.jpg|400px]] | ||
| − | This one is based on a chip called [ | + | This one is based on a chip called [https://stm32world.com/images/4/47/TM1637_Datasheet.pdf TM1637]. |
== Crazy 8 Digit, LED and Button Module == | == Crazy 8 Digit, LED and Button Module == | ||
Revision as of 01:37, 22 May 2022
For a project, I needed to display some numbers. There are of course a lot of different way to approach this, but a cheap (and presumably easy) way is to get some old fashioned 7 segment LED display modules.
The 7 segment LED displays literally consist of 7 LEDs arranged in a way where numbers can be displayed. From a random datasheet they are all arranged like this:
In other words, to drive 1 digit one would need 8 GPIOs.
This is of course quite hard if one were to drive 4 or 8 digits (4 x 8 = 32 or 8 x 8 = 64 GPIOs needed).
As is quite usual with me, I might (as can be seen on the photo to the right) have overdone it a bit and I managed to get 3 different types.
These modules are readily available and they are absolutely insanely cheap. Unfortunately, cheap usually means:
- Poorly Documented
- Some bizarre communications protocol
4 Digit Display Module
The first module is one with 4 digits.
This one is based on a chip called TM1637.
Crazy 8 Digit, LED and Button Module
8 Digit LED Display module
Miscellaneious Links
To be added