im working on a PCB design around the P1 module and noticed 1k resistors in the reference design for the Photon in series to the internal RGB LED (https://docs.particle.io/datasheets/photon-(wifi)/p1-datasheet/#schematic-user-i-o). I’d like to include the same RGB LED in my design with 3.3 VCC. But I cannot get my head around the 1k resistors. Aren’t those too large, especially when looking at the datasheet of the Cree CLMVB-FKA LEDs with forward currents of 10mA(G,B) / 20mA ®? Why was this value chosen?
Thanks in advance,