AEG Mosfet - Simple Basic MOSFET DIY

[jomarx]

@ bro DaYWalkeR - Computerized mosfet have this. When the voltage goes down by 15%, the AEG automatically shuts down. :)

[DaYWalkeR]

@ bro DaYWalkeR - Computerized mosfet have this. When the voltage goes down by 15%, the AEG automatically shuts down. :)

Sir jomarx, Does the jaguar have this feature? Meron ka pa ba available for me? Hehe...

[jomarx]

Sir jomarx, Does the jaguar have this feature? Meron ka pa ba available for me? Hehe...

The Computerized Mosfet Class :
Phanter
Cheetah
Evolution

Jaguar is a AB model only...

[kodokks]

Its me again sir Jomarx,

I've read somewhere on the airsoftmechanics forum, cant remember which thread, that sir gandolf did a paired 1404 kit. Was he only experiment or there was reasons behind that? please shed me some light in this matter....

Thanks

[jomarx]

Its me again sir Jomarx,

I've read somewhere on the airsoftmechanics forum, cant remember which thread, that sir gandolf did a paired 1404 kit. Was he only experiment or there was reasons behind that? please shed me some light in this matter....

Thanks

It was the Systema Mosfet repair kit thread. He was about to parallel it, but never did in the end. Same reasons. :icon_smile:

[kodokks]

It was the Systema Mosfet repair kit thread. He was about to parallel it, but never did in the end. Same reasons. :icon_smile:


I've found the thread. it's "The BIG one :D 5550 Watts of drive!!! (http://forums.airsoftmechanics.com/index.php?topic=1200.0)"

I think he piggybacked both FET....care to explain what happen there sir Jomarx? thx

[jomarx]

WOW, he physically 'paralleled' them. I think this is the reason why it worked :
Unlike the Systema dual MOSFET switch, these dual FETs 'thermally communicate' very well

I think that helped in sharing the load. But I could be wrong. :icon_biggrin:

[kodokks]

WOW, he physically 'paralleled' them. I think this is the reason why it worked :


I think that helped in sharing the load. But I could be wrong. :icon_biggrin:


So, what you're saying is, by simply piggybacking the 2 FETs, i can share the load??

ps: this piggybacking is simply just connecting each pin from 1 FET to the other. Is my understanding correct sir??

Whoaa...this is getting very very interestingg....imagine piggybacking more than 2 FETs...:icon_twisted:....less heat for the FETs..

THanks Sir

[jomarx]

If my understanding is correct, then its a 'yes'.

Piggybacking helps in load sharing. :)

Just make sure that the 2 fets are connected well, so it can share the heat. And make sure there are no shorts.

[kodokks]

Just make sure that the 2 fets are connected well, so it can share the heat. And make sure there are no shorts.

Yes Sir.:icon_biggrin:

Thanks

[terminusx]

@kodokks

i tried to piggy back mosfets and it works like a charm... :icon_biggrin:

[kodokks]

@kodokks

i tried to piggy back mosfets and it works like a charm... :icon_biggrin:

Whoaa..thanks for giving me more confidence in doing the piggyback trick for my kit....

:icon_biggrin::icon_biggrin::icon_biggrin:


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@kodokks

you can parallel mosfets and it can equally share the current load but you need to change the schematic/circuit layout...

the difference between the IR"L"1404 and the IR"F"1404 version is that the max drain current of the "F" version is 202A while the "L" version is 160A... but don't get confused about the max drain current... the "F" version needs a 10v gate voltage to max out its drain current while the "L" only needs 4.5V...

pacorrect na lang kung mali... :icon_biggrin:

Dear all,

Here's a stupid question, if the F version needs 10v gate voltage to be turned "on", then if i paralleled it, does it mean that it need doubled the volt or no? (since paralleling is done to pretty much doubling all the characteristic of the FET)

i'm using lipo 11.1 2300 mah. will it work?

Thanks again

[terminusx]

Dear all,

Here's a stupid question, if the F version needs 10v gate voltage to be turned "on", then if i paralleled it, does it mean that it need doubled the volt or no? (since paralleling is done to pretty much doubling all the characteristic of the FET)

i'm using lipo 11.1 2300 mah. will it work?

Thanks again

the answer is no... the required gate voltage will be the same even if you parallel 2 mosfets...

the fet doesn't need 10V gate voltage to be turned "on"... it needs 10V gate voltage to work at its full capacity but there are other factors to be considered also...

two mosfets in parallel can handle twice its rated drain current...

[jomarx]

The answer is no.

According to Wikipedia (http://en.wikipedia.org/wiki/Series_and_parallel_circuits):
Components connected in parallel are connected so the same voltage is applied to each component.

Therefore, both FETs get 11.1v each.

@ bro terminusx - naunahan mo ako ah. heheheh

[kodokks]

@ Sir Jomarx n Sir Terminusx

Now that i think i can make the kit work accordingly, i want to ask how to incorporate fuse into the kit (to protect my lipo battery getting unwanted pregnancy :icon_rolleyes:)

Thank sirs

[jomarx]

Fuse can prevent bloating by tripping on a short circuit, but it cannot protect your lipo from getting discharged.

But you can use this (http://www.filairsoft.com/forum/showthread.php?t=58149)as a precaution.

You can use 2 polyfuse (MF-RHT650 on digikey) in parallel to protect your mosfet. Check this thread (http://www.filairsoft.com/forum/showthread.php?t=52330) for inspirations.

[Nyleus]

Hi,

ask lng ako sana about sa wires. i was wondering na pwede po ba gumamit ng automotive wire? medyo mahirap kasi maghanap ng silicon wire dito sa amin (davao). can an automotive wire can be use as substitute?

Tnx,
Nyleus

[terminusx]

Hi,

ask lng ako sana about sa wires. i was wondering na pwede po ba gumamit ng automotive wire? medyo mahirap kasi maghanap ng silicon wire dito sa amin (davao). can an automotive wire can be use as substitute?

Tnx,
Nyleus

pwede po sir... basta use the correct wire size/awg...

[jomarx]

Automotive wire can be used, but make sure you get the low resistance ones. Or else it could be the source of your problems...

[kodokks]

@ Sir Jomarx,

Update sir, used the kit at the field yesterday. Everything worked fine, no significant heat buildup. Used the piggyback method and adding aluminium heatsink to the kit.

THanks sir for your help.

ps: for the fuse, i attached it like a normal normal setup (only on the positive wire from the battery. Is this correct? or do i have to incorporate it with the kit (like the systema or JG kit)? thx sir

Cheers

[jomarx]

As long as it has a fuse, then its ok. Location is not that important. Another factor is the amps rating of the fuse used. You should try to find out which fuse is the best for you. :)

[Nyleus]

ok thanks. :D

[osrac_gwapo]

automitive wire?! lalong humahaba lalong lumalaki Resistance ng current...back wiring for p90! 36 rps!...front wiring 32 rps lng! same gun same setup...effects? 4 rps short!


sa ganito palang ma compare mo na yuing difference...

[CLYVZ]

automitive wire?! lalong humahaba lalong lumalaki Resistance ng current...back wiring for p90! 36 rps!...front wiring 32 rps lng! same gun same setup...effects? 4 rps short!


sa ganito palang ma compare mo na yuing difference...


Great Info sir Osrac105! lalo na siguro hindi sliver wires...ang lakas ng pag baba ng rps.

[DaYWalkeR]

I just got the Panther from sir Jomarx today. Thanks a lot sir... Then I just discovered how bad I am with soldering :icon_cry: I just broke the small metal piece on the motor where the wire should be soldered :icon_razz: Guys help!!! what should I do???:icon_wall: