/diy/ - Do It Yourself

>>1746705
>looks fine
you blew the output, too much current on the bed
most of these shitty power supplies break this exact component (I blew 2 on trying nylon in winter with those dumb mosfets on the bed heaters)
a used atx supply works better (separate current for bed, smart cutoffs), I abandoned my heated bed and moved to a mini 200watt computer power supply for those tiny minatx NAS computers cuz I got a new one for free.
I have learned to hate large bed heating in unenclosed printers, its costly to avoid other than insulating the back, removing drafts in winter, using smaller mosfets (and longer heatup time) and better surfaces other than really hot beds(and turning them lower after the first 10 layers when the fan kicks in). a certified atx is prob your best bet if you want to do long 100 degree bed temps.