thanks for the quick anwser!
I just read the article, and in the comments it is said that the problem somehow isn’t the transistor itself.
Anyway, just hooked up a BC547 and so far, everything works without flashing.
So…With my transistor and a 5 ohm resistance between base and data pin the led’s Start flashing when i turn the light off, to be more precise when the transistor is in darkness.
Any suggestions?
Get a 74HCT245 or a 74HT125 