All but done with linear actuator drive circuitry.

 The tests are done but for the actual hookup of the new  circuitry to the LA36 linear actuator.

Some changes needed to be made. A minor problem is the cheap hookup wire. Bend it a few times and it breaks. The grounds had to be isolated on the H-bridge inputs. One ground connection from one level shifter to one H-bridge input. 

I mention the small parallel mosfet boards, with no input isolation, in an earlier post. A couple of those boards are being used as level shifters to convert the raspberry pi 3.3VDC GPIO output to the 5VDC needed to drive the H-bridge inputs. The 5VDC also comes from the raspberry pi.

The ground jumpers I had originally installed on the H-bridge inputs, to create a common and shared ground reference, needed to be removed. This was the last hardware modification. 

Next, I need ti incorporate the forward, reverse, and off python scripts into the LA36 driver script.

The image show the new circuitry/PCBs. The level shifter are top left and the H-bridge is bottom left.