9 replies to this topic

[Kokanee]

It's a wintereenmas miracle!

http://www.wgcshop.com/pcart/shopper.php?i...C-MOSFET_srch_1



- MOSFET Unit completed as a single package, replacing Mechanical Main Switch
- High Quality USA-Made 16 Gauge Wire for Input & Output
- Battery input up to 15V
- Recommended up to M150 / 300% springs

Advantages of MOSFET instead of Mechanical Switch
* Reduces lost of power during contact of switch.
* Prevent sparkle which leads corrosion of switch contacts ( especially semi-auto ).
* Mechanical switch remains as signal switch for greater durability.
* Fast Response and high efficiency, suitable for high power upgrades.

[ufokillerz]

mosfets dont cost that much to build, you can build a better one for about $5 USD if you had to purchase everything including wires, heatshrink, mosfet, resistors etc.

[Boba_Fett]

mosfets dont cost that much to build, you can build a better one for about $5 USD if you had to purchase everything including wires, heatshrink, mosfet, resistors etc.

<{POST_SNAPBACK}>

That´s it. If you are able to install a MOSFET you are also able to buy these parts in an electronic shop.

[dynamic_e]

I dunno about you, but good low resistance MOSFETS like the IRL 3703's are $5 a pop. 2 of those, wiring, board, resistors, etc, you are looking at $15. Then your time...most noobs will mess up their first few times and blow $20+ of materials.

[Pendra]

I just made a spec FET setup for an AK. It is a modular system where you can insert or remove the MOSFET modul (revert the gun into stock fire controll) within secs even on the field without any tools. I plan to create further enhancements for the system, like a burst modul, a remote controll modul, a pulse modul for the motor etc. Only 1 modification needed. Afterward it is plug and play .
I sell this mod for 25$ with installation and 2 FET moduls (1 in the gun, 1 spare). I use an IRF3205 mosfet and it works good so far. And if someone manage to blow it, I can replace the blown for a good one for an extra 3$.
The funny part is that this system is not too popular here. Noone interested even after the M130 upgrade killed the thin CA switces. Not my problem as my M120 gun shoots ~1200 round/sec with standard gears and 9.6 battery without a single spark.

[Maruta]

*generic "huh? what?" response*

[likus]

My friend and my brother built a similar system, but with addition of condensator for even faster response. They calculated that the design cost around 5 euros to build. I'm waiting eagerly to get one in my AUG...

[ufokillerz]

I dunno about you, but good low resistance MOSFETS like the IRL 3703's are $5 a pop.  2 of those, wiring, board, resistors, etc, you are looking at $15.  Then your time...most noobs will mess up their first few times and blow $20+ of materials.

<{POST_SNAPBACK}>

you can tell from that picture that they only used 1 mosfet



Pendra

That sounds quite interesting! have any pictures?

[Pendra]

I have a schematic picture somewhere. I will put it up to the project section sometime in the future. It works for any gearbox, that does not have wires inside (such as a V3). I can do it for a V2 too, but I need to use thin wires for the switch circuit. Therefore you can't revert it into the FET-less form. You can actually, but it will burn the wires in a sec. However, you can swap the FET modules anytime.
It is totally foolproof now, but I try to figure a way to make the installation as simple as possible, so even a ham fisted 12 years old would be able to do it at home. If it goes well, then I will sell it as an upgrade kit over ebay .

[likus]

AirsoftMechanics.com has an article about MOSFETs:

http://www.airsoftmechanics.com/guides.php?aid=14