This write up is intended for anyone who wants to add in a power metal oxide semiconductor field effect transistor in parallel with the switch on a Vulcan. I did this to my Vulcan so that my arduino can control when it fires.
First things first, here is the standard wiring diagram for a Vulcan:
And here is the wiring diagram with the MOSFET added in:
When you crack open your gun, you are going to want to remove the trigger itself. Before that though, you want to bypass the trigger from the on/off switch straight to the motor:
Next, remove the trigger from the assembly. This is accomplished by unscrewing one or two screws (I can't remember which).
Your trigger PCB should look like this if the trigger switch is facing DOWN:
You want to solder the MOSFET on like so:
You can see how I used some of the unused space on the PCB in order to solder on the Gate pin.
After you soldered in the MOSFET you can easily add in the 10.0k Ohm resistor as seen in the above picture. After that's done, you can screw the PCB back in place.
The wires can be lengthened to accommodate for an external battery and the signal interface.
You can use a 4 pin connector to allow for easy gun interface. If you have any questions please leave a comment.
