See the schematic below. We can see 8 LEDs in parallel for each segment and one separated LED for the decimal point. Sicne the WS2811 can't control 8 LEDs at the same time because not enough current, I'll use some PNP transistors to do that. Each transistor has a 2K pulldown and will be controlled with a PWM signal form the WS2811 driver. We will also need the drivers and a few more female and male pins to palce around the PCB. We use some resistors to limit the current.
