Re: transistor problems
Hi Rambo,
Does the gun work now, even if the MOSFET gets hot?
The RFP12N10L has an rDS(ON) of 0,2Ω so if 10A flows through the transistor
it will dissipate P=RI²=0,2*100=20W - quite a lot...
Obviously you cannot decrease the current so your only option is to find a
MOSFET with lower rDS(ON), e.g IRF540N with an rDS(ON)=0,044Ω => 4,4W of
dissipation.
Another common trick to decrease the resistance is to connect several MOSFETs
in parallel. If space permits you could try that too.
/Rambo