A few years ago I created a PCB for a 32 Led shift register, but I never finished it. Now for a new idea it is needed, so I solderd it together.
It took me a while to understand how to configure the code for four 74HC595 shift registers in Arduino, but after a little bit of trial and error, it finally works.
Now I can control 32 LEDs with just 3 Data lines 🙂
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