This is my version of the popular OSMC (open-source motor-controller) H-bridge. I have actually built several different models of this board to run various robots with, but this is the most compact version of that board.
Well, that is simple - there was not a version of the OSMC that you could print out on a single-sided PCB with all through-hole components.
I decided that what better way to build a PCB design than with a tested schematic, so I used the existing OSMC schematic that utilizes 16 mosfets and reduced it to have only 4 total mosfets. This is not some genius idea that maximizes efficiency or anything like that, it is simply an OSMC board that handles around 30-40 amps instead of 160amps - intended for projects that do not have as high of a power requirement.
The OSMC design uses the popular Intersil 4081 full-bridge mosf
et driver chip that is intended to drive an all N-channel mosfet bridge since N-channel mosfets are cheaper and generally have a much lower internal resistance which means that it produces less heat.
Below is a simple schematic suggested in the 4081 datasheet:
Also, a truth table for the inputs and outputs of the 4081 chip:
Below are links to the pcb files to be opened with Eagle Cad.
Schematic:
Board file:
