Help with bipolar LED's and Transistors
In your schematic, the PNPs need to be on the high side, and NPNs on the low side, all in the appropriate direction (+ → -). But you are overthinking it; using the MCU's standard push-pull outputs (which you've almost reconstructed in your schematic) with opposite levels will light the LED assuming the output voltage is high enough for the LEDs, and you can use alternating polarities to turn it the combined color.







simulate this circuit &ndash; Schematic created using CircuitLab