Transistor is a BC547B Intelligent Power and Sensing Technologies | onsemi and it can really be that I did change the C and E of the transistor - see my first post
I'm new with electronic / microcontrollers
and I have to learn much.
I did read the German Wiki for "Use transistor as switch" what's called in German "Emitterschaltung".
There is descriped, that E is connected to GND and C is connectted to relais
Is this right?
kloeppi