I tried to get that to work BJ, never could...Jhonutz tried to walk me through it...seems it works when just using the IC but not in module form...however...this is off of one of Nicotimes threads...it's how to wire a mosfet into a cct that's more like a drawing and a little clearer to follow...the thing to remember is you're switching the negative not the positive. Be mindful of your polarities but just pretend that the atty con is the 2596's inputs...I'm no rocket surgeon but it should work...
Oh wait, I remember now...the reason it doesn't work in module form is because the trigger is hard wired to ground...I never did do it but if you de-soldered and lifted pin 5 off the board then you could use the trigger...I'm just waiting on a shipment of 2596's (long list of buddies wanting PT's, plus I'm hard installing one in the ashtray of my car and pwr it off my cigarette lighter cct, now that'll be a weird mod

)...I'll be wrapping my head around this subject again when they show...