I picked a Presser figure set up that has a welder/gas cutter simulation it comes with the resistor wired up , but I require a box of tricks to make it work . If I apply voltage it will just glow blue ,the LEDis the size of a small pin head all cast in to the figure.
I have a Viessmann switcher for the job , how ever it requires a16v AC so thats a no go .
I have not looked for the parts to build one yet ,if there is a ready made one out there.
Boat using 2 12v sla's