I have hooked the LED-Strip counting 60 LEDs up to an external power supply because obviously the pi cannot supply enough power.
I have played around with it a bit, got some effects and yada yada yada... Now I wanted to come back to it and found out it is not working anymore. Only the very first LED lights up and I cannot control the strip at all anymore.
Now what could have happened that it doesn't work anymore?
At one point I accidentally got stuck in the little cable and removed it from the Strip, so that for a couple of seconds only the data (Pin12) was disconnected. Could that have caused some damage?
I'm really worried that something is broken but without the pi I cannot verify if the LED Strip is even working, and I don't know how to verify if the GPIO Pin is working.
I have tested the pins with
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I've taken my other Pi (Model 3b+) and installed the python library, connected the LED Strip and everything works just fine. So it must be that pin on the Pi 4 that is defect.
I really want to understand how this happened, so I can avoid that happening in the future - or is there something else even I could do?