motor controller, all you need to do is print the .brd file onto some magazine paper using a laser printer, and iron that onto a piece of clean copper-clad. Then etch it with your favorite etchant solution (I use 2 parts Hydrogen Peroxide to 1 part Muriatic Acid and it works perfectly). And remove the toner with Acetone when done etching. For ease of assembly I designed this board to be Single-sided and to use only through-hole components, no surface-mount stuff to mess with! Yay for you. You can get the .brd files for the various h-bridges at www.rediculouslygoodlooking.com
Image Notes 1. this is the 2nd H-bridge, notice that the motor screw-terminals for each motor will be on opposite sides of the board. 2. This is the 1st H-bridge
http://www.instructables.com/id/20-Unbelievable-Arduino-Projects/
Image Notes 1. bussed resistor networks 47ohm. They have 1 input and 5 outputs, this board only uses 3 of the outputs. 2. pull up/down resistors 4.7k ohm, these keep the Mosfets turned off when not being used. 3. capacitors, I used (4) 680uF 50v, but you can substitute others that fit. 4. screw terminal connectors for motor terminals and power