First Glimpse of a USB Hbridge

Im happy to present an image of my very first Hbridge being controlled by an opto-coupled microcontroller which is being controlled from a computer via USB. Just for testing, I have all four legs of the Hbridge on at once here. In a real motor situation having all four legs on would cause either a breaking effect, or whats known as shoot-through where you accidentally cause a direct short through the bridge. This normally ends up ruining a bunch of components. Currently I don't have the correct protection diodes to run an inductive load on this bridge, but I am tempted to anyway because its optocoupled and cant harm my computer. An inductive load is something that can generate electricity, or cause a magnetic field. It basically means when you turn off something inductive its likely that thing will shoot some dangerous voltage back in the opposite direction it was being run at! In a DC system, you make sure everything always goes the same way, and inductive devices like transformers, motors, or coils can do damage if not handled correctly. For having no formal training in electrical engineering I consider this a pretty good accomplishment.

The major problem I still have with this is that like the old Futaba ESC(Electronic Speed Controller) I used to have, I want to be able to control both forward and reverse movement with only one PWM control line. Im not quite sure what I will need to do in order to make that differentiation yet. Im thinking an active high pass filter is what I need to make, but have no clue how at this time.