5 axis CNC Breakout Board with Optical Coupler for Stepper Motor Driver MACH3

here we go one of these cheap Chinese breakout boards with a relay five old USB and a parallel port over the sail bag at the parallel port connected to a smooth stepper I found that the inputs were not working let's use one sign here and however the relay in the outputs all working a bit of Investigation I found that there is actually no 5 volts applied to those sides of the dough couplers so I'm going to jump from the PC 5 volts to the opto coupler and then we can ground the opto coupler simulating a limit switch stop that's wrong my vestige show you this we've got the ground terminal screw down to PC ground take a look at and see is PC with 5 volts there we would also see 5 volts on the top of the I to a couple of their what we would also expect is a 5 volt line here there is almost nothing there's P 10 grounds to this lead here so order to get this to work what I've had to do is a ta