![NPN and PNP transistor LED Driver connection | right led connection with npn and pnp transistor - YouTube NPN and PNP transistor LED Driver connection | right led connection with npn and pnp transistor - YouTube](https://i.ytimg.com/vi/IpInB-RqGJ0/maxresdefault.jpg)
NPN and PNP transistor LED Driver connection | right led connection with npn and pnp transistor - YouTube
![I have a PNP BJT and an LED driver (current sink, theoretically 20 mA and max 3.3 V). The LED driver is connected through an LED to the base of the BJT. I have a PNP BJT and an LED driver (current sink, theoretically 20 mA and max 3.3 V). The LED driver is connected through an LED to the base of the BJT.](https://preview.redd.it/i-have-a-pnp-bjt-and-an-led-driver-current-sink-v0-1mbmtkqu4zfb1.png?width=640&crop=smart&auto=webp&s=84f4d1c009a289f9a6e4f6968811b9b06e3b8207)
I have a PNP BJT and an LED driver (current sink, theoretically 20 mA and max 3.3 V). The LED driver is connected through an LED to the base of the BJT.
WFS3-40P415 | Sick Infravörös LED Címke érzékelő 3 mm, PNP, 10 → 30 V, 4 érintkezős M8 csatlakozó, IP65 | RS
![LDR circuit diagram with PNP transistor (dark detector) | Ldr circuit, Circuit diagram, Electrical circuit diagram LDR circuit diagram with PNP transistor (dark detector) | Ldr circuit, Circuit diagram, Electrical circuit diagram](https://i.pinimg.com/474x/29/42/42/29424235f051c57c4ca1bdf886d09573.jpg)