Uq=Uv+UF Typ. LED: U_{F}=1.6 \dots 2.5V$$$$I_{Fmax}=mA Rpi: GPIO-POrt 3,3V 10mA Ziel: 10mA max LED → 0.6V/2.2mA U=R∗I=\ohm∗2.2mA=R=2,2mA2,7V≈1,2k\ohm I=16ma→UF≈0.75V RV⇒UV=2,55V RV=16mA2.55V≈160\ohm