MOSFET Protection
my mosfets keep getting fried (is sophisticated technical term?). basically, i'm using arduino switch higher voltage. load non-inductive. @ times, because of moving things around, connection load sparks @ point mosfet no longer switches off source/drain. 1 time destroyed arduino (fortunately $10 sparkfun pro mini) i'm assuming time gate/source fried.
it needs able handle getting spark. how can protect mosfet getting fried in situation? i've commonly seen schematics inductive load (small motor) there's diode in reverse parallel load. i've seen schematics there diode across source , drain, , ones there's diode across gate , source, don't know if applicable here.
what configuration appropriate situation? i'm guessing it's both diode across source , drain , diode across gate , source, that's guess , blind testing expensive. also, type of diode? zener? schottky? ordinary diode? thanks!
it needs able handle getting spark. how can protect mosfet getting fried in situation? i've commonly seen schematics inductive load (small motor) there's diode in reverse parallel load. i've seen schematics there diode across source , drain, , ones there's diode across gate , source, don't know if applicable here.
what configuration appropriate situation? i'm guessing it's both diode across source , drain , diode across gate , source, that's guess , blind testing expensive. also, type of diode? zener? schottky? ordinary diode? thanks!
non-inductive ? , have sparks ? wire of 1 meter can inductive.
i think don't have protect gate, use fly-back diode on load.
you can add diode across source , drain, if unknown things happening.
did have shortcut, mosfet shortcuts power supply ? not can that. perhaps can use 100a mosfet, if power supply 4a.
you have know grounding. when grounding wrong, spark load creep arduino , destroy it. can avoid relay or optocoupler.
can tell more ? post full of unknown things. higher voltage, load, mosfet, , on.
i think don't have protect gate, use fly-back diode on load.
you can add diode across source , drain, if unknown things happening.
did have shortcut, mosfet shortcuts power supply ? not can that. perhaps can use 100a mosfet, if power supply 4a.
you have know grounding. when grounding wrong, spark load creep arduino , destroy it. can avoid relay or optocoupler.
can tell more ? post full of unknown things. higher voltage, load, mosfet, , on.
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