Good day everyone,
I am following this guide to build an H-Bridge: http://www.mcmanis.com/chuck/robotics/tutorial/h-bridge/bjt-use.html. I finished building it and it works, exept if I want to use a PWM Pulse. I connected the ENA cable to the PWM port on the PIC. However, when I output a 0% duty cycle, the PWM port still has an voltage on it (1V), thus the DC Motor will not turn, because the PWM port doesn't ground the ENA signal.
Is there a flaw in the design? Should I use an extra NPN transistor connected to ground, with the base connected to ENA?