But I do have a question, is there an advantage to have the rectifier and regulator separate? I believe a lot of guys use a AC to DC combo board when they add LED lights to their passenger cars. And John even sells one he has designed that is adjustable for those lighting projects. Do these not provide the current wee need for smoke and couplers?
John would have to confirm for that specific board, but with a linear regulator like that at the voltage drop and current we're talking about, you probably wouldn't need a separate smoke unit...
It would dissipate 4-5 watts just powering the smoke heater alone.