Can someone please answer me why the bases from Q1 and Q2 are connected together over 470 ohm resistor? same with Q3 and Q4?
I am making microstepping project based on this schematic but I am confused because if I do this the two PWM signals from the MCU will be mixing and the two coils won't get the right voltages. anyone?
This is the simulation I've done and the results are expected.