Billy Breach Mosfet Review

[Bachelarius]

Re: Billy Breach Mosfet Review

I've heard there is something to do with the micro switches causes problems.

What make is your scar? I trying to work out if I can get one in my vfc once my new stock turns up

Yeah, micro switches ARE a problem, the vibration of a rifle during cycling makes it jump about from on to off. As you can imagine, with something like a breaking mosfet, this creates a tonne of heat and premature motor wear from it stalling mid cycle. Same for smart mosfets, makes them jutter and get confused with timings and starts and ends of a cylce due to the many on-offs happening. Plain mosfets don't care though, they can be switched on and off far faster than the vibrations, so at worst they may show a little extra heat. If you look inside the microswitch you will see that it is still just a switch and that's what the mosfet will treat it as.

Good luck with the VFC, that thing's notorious for being hard to wire any mosfet into.

[dave38x]

Re: Billy Breach Mosfet Review

Forgive me for asking, but I am a complete mosfet noob - how does a single signal wire to the switch work? What do you solder the other contact on the switch to???

Also - is there any way to fit this in a gun and still have a stock tube lipo? My gun is a rear-wired M4 (g&g/jg)

[Bachelarius]

Re: Billy Breach Mosfet Review

Hi Dave,

Technically there are still 2 wires that go to the switch, just one of them is the Red or Positive wire. In essence it's exactly the same wiring as the regular 2 signal wire setup (2 to the contacts and 2 to the motor) but instead of the positive wire going straight to the motor, it has the switch block form a T junction. So the switch block itself almost is the 2nd signal wire, if that makes any sense at all :/



Like I said in the review, it's a little more prone to motor noise up there rather than further back in the mosfet, but it saves a wire and is a lot easier to use with front-wired setups.

As for still keeping it wired to the stock tube, I'm afraid not easily. You would have to double wire it:

i.e.run wires from the rear through the gearbox to the front, where the mosfet sits, then back again :S but that would lose any gains you may get from rear wiring - i.e. quick upper and lower disconnect. You would have to use thin wires in order to fit it all in, can't say how thin as I've never tried it! :S

[dave38x]

Re: Billy Breach Mosfet Review

Thats perfectly clear, thanks very much mate! May investigate the following:

a) A crane stock
b) Never collapse my stock when there is a battery in it (makes the most sense to my mind, I play with it fully out anyway
c) Acquire a UBR (mosfet in the little pocket on the stock, battery in tube)
d) Spend an evening with mr dremel hollowing out a space behind my GB/up into the stock tube :P

I definitely intend to get one of these kits though (when ive switched to a high torque motor and 9.9 LiFes

[eatthis]

Re: Billy Breach Mosfet Review

just bought 1 and if its good il buy more

[simuk]

Re: Billy Breach Mosfet Review

I have now burnt two of these out, both initialy worked fine. Alas it could have been a short as i found some broken silicone tubing near the motor spade connectors. It's also possible that the new gear set i used was badly shimmed and caused to much friction. Then again it could have been the crappy old firefox 9 cell himh battery that i tried before i realised it was useless and did not have enough power to trun the motor over (i have read that low power batteries are bad for mosfets). I am not trying to put anybody off here infact i have ordered another mosfet from Billy as the problem is me not the mosfet.