MOSFETS and Solenoids

[Tobias]

Thanks for pointing that out. Theoretically, if the board is completely isolated like the attached schematic I will be immune to electrical noise like markedwards is talking about or am I just minimizing it?

markedwards...I am pretty sure the PIC isn't resetting because the first stage stays engaged. When the PIC powercycles it goes through a start up sequence thats about ten seconds long including turning off all outputs. If its electrical noise its definately only at higher rpm. Testing in the shop everything looks fine.

I am getting a 4 channel analogue module for our data acq system. I am going to make some voltage dividers to log the voltage output of the MOSFETS with the 0-5v inputs.

Look at your opto isolators. You have tied the Led cathode to the same ground as the opto transistor ground. That is what I wish you could break apart and keep apart.