heya everyone,
ime working on making my aquarium into a vivarium and ive stumbled on a stupid problem,
i have set up 2 computer fans for fresh air and circulation inside the tank and lowered rpm whit a power transistor on a sink and a potentiometer, this works fine as is,
but now ive made my verry own cold steam vaporizer whit 2 0.2A comp fans driven by the same transistor (2n5430) for some reason these fans chew up my components, i had a bd677 driving it at first but that blew up and destroyed my potentiometer, so i moved on to my 2n5430 again and that chew up another pot, so ive put 13k in series whit the base to get the rpm i whant and placed a big heatsink but now my heatsink gets realy hot,
they both run of the same 12v supply so why dos it work whit a small print pot on 1 set of in total 0.4A fans and dosnt on the other set witch is identically made ?
ime working on making my aquarium into a vivarium and ive stumbled on a stupid problem,
i have set up 2 computer fans for fresh air and circulation inside the tank and lowered rpm whit a power transistor on a sink and a potentiometer, this works fine as is,
but now ive made my verry own cold steam vaporizer whit 2 0.2A comp fans driven by the same transistor (2n5430) for some reason these fans chew up my components, i had a bd677 driving it at first but that blew up and destroyed my potentiometer, so i moved on to my 2n5430 again and that chew up another pot, so ive put 13k in series whit the base to get the rpm i whant and placed a big heatsink but now my heatsink gets realy hot,
they both run of the same 12v supply so why dos it work whit a small print pot on 1 set of in total 0.4A fans and dosnt on the other set witch is identically made ?