it’ll work - unless you do it wrong hahahaaa
so here’s how it works which is probably more useful to you than me saying…yay, mine does. a couple others here have done similar things to their vectors as well…or so i read somewhere along the way…
fire selector…there’s some circuitry involved but what’s important is that it switches the motor on and off. that microswitch on the side of the box is super important in the process.
a fet is really just a fancy relay - in concept…so a switch where current flows on the other side
the motor lead when switched on (trigger in, fire mode X, pew pew) is the NEGATIVE.
this is testable as the positive motor wire is connected directly to the battery - use a multimeter & continuity test to confirm,
so you pull trigger, -ve wire becomes alive and all we’re doing with the second fet is using that live trigger wire (bad name but good illustration) to tell the secondary fet to fire, or otherwise…turn the motor on.
if you were to wire the secondary fet (t238 like mine or easyFet) you’d note that what you’re doing is using the trigger to switch the fet input / signal to turn the motor on.
what we’re doing with the two fet system is using the stock fet to count the cycles (pew pew pew) and instead of using the stock fet to feed the motor its amps, we’re using it to tell the secondary fet to turn the motor on and suck as many amps as it likes.
its not a silly question and its been a yarn i’ve had with many people who once they twig go…ohhh…yea, thats really quite simple
but it does sound like some sort of swamp magic up until that point
my kriss isn’t entirely back together yet (awaiting some goodies) but its been tested.
easy as test regime
without the second fet
- pull trigger, hold in
- test that negative motor wire has continuity to negative battery terminal
- woot, we have the right wire
add in the second fet using the wire above as the trigger (it is important that your fet triggers on -ve)
- again, pull trigger, hold in.
- same test but this time the negative motor wire from the second fet to the motor gets checked for continuity
by testing without the motor attached there is no current drawn so you can’t force the magic smoke out.
see calcifer for a bottle of smoke if you do…
yay / nay? clear as mud? onboard with swamp magic?