I am trying to run a LED strip with external power and a BD243c (Data sheet: http://www.bucek.name/pdf/bd243.pdf).
The Arduino is fading nice between 0 and 5V but the LED strip is only doing weird stuff. No clear pattern visible. I tried a 550Ohm resistor bevor the base but no effect.
Transistor should be wired correctly, changing Emitter and Collector had no effect either.
Any help? Thanks a lot