LTL-7100M-HB : The super weird bi-color LED bar graph.

Month ago, I got some very rare LED bar graph from yoycart ( Chinese taobao agent) here.

And this is some bit from datasheet with the Charlieplex-like connection of bi-color LED (green,Yellow)

Annotation 2020-04-28 100104

Now we have the diagram, It’s time for the real thing up and running ! As again. No arduino this time, just bare metal STM8L151F3U6. My choice beside Arduino for quick prototyping.


Looks like Photoshop-ed uh? Now some closer look. Compare to my stm8l dev board.


Lovely TINY. Barely sit on the bread board





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