Fire extinguisher mod build

[pharryn]

I work for a fire equipment company and got an idea while getting rid of some old extinguishers today. I grabbed a 2.5pound extinguisher that I'm going to use for a box. My only problem is I've never built a mod before. I know to be safe I need mosfets and fuses and stuff but I'd like to know exactly what I need to get and maybe a wiring diagram would be nice. I was thinking I would get 4 dual 18650 battery sleds and wire them so there's 2 sets wired parallel and wire them together in series so i could have 8.4 volts and still have good battery life. If anyone with more expierience building mods could tell me what parts i need and how to wire this up it would be greatly appreciated.

 

[Signmaker]

I am no help on the components...but just wanted to comment that I would totally buy that. Or maybe a 2x18250 built into an alarm pull station box. Sick idea.

 

[pharryn]

I'm wanting it to look like a normal extinguisher with an atty screwed to where the nozzle would go when I'm done with it. Everything will be contained inside and I'm going to make the handle operate the fire button. But we do systems too so maybe if i find an old alarm pull box laying around in the shop I'll make another mod out of it. It is a pretty cool idea.

 

[Susan~S]

Hello and welcome to the forum pharryn. Glad to have you here!

Try browsing around the Modding Forum. I have not seen any modders out tonight but if @dc99 is around I'm sure he will pop in.

 

[pharryn]

Thanks Susan and I'm glad to be here. My smy 260 just burnt up on me so i decided maybe its time to build a cool unregulated device so I'm not tuck with just my fuhattan while my other mod is getting fixed.

 

[dangkhoa02106]

Sorry if I do something wrong, my mod, you're awesome, lol.

@pharryn: You can go to breaktru forum,at this website, you can learn a lots of stuff. Good luck.
By the way, I do not like to vape with an extinguisher mod, lol.

 

[pharryn]

Any modders on here this morning that could help me out? Any direction i could get would be greatly appreciated

 

[dc99]

That's a lot of batteries. That many would last a week before charging. The problem would be trying to get that many matched up. Let alone all the charging time. Why not just use lipo packs if your going that far.
Are you talking un-regulated?

 

[pharryn]

Well I thought about that but them id have to buy a charger for the lipo, but I guess that would be a good excuse for me to get an rc car again to mess around with. Also I was thinking unregulated because of the simplicity but having a way to adjust voltage would be nice. Like some type of potentiometer or however its spelled. Would i be able to make something like that work? thanks for the help and advice man.

 

[dc99]

Well, you could do a raptor or okr chip. Mamu in the mod section is the master of those. I honestly wouldn't do that many batteries. I have a mosfet fired box with 3 18650s and it is overkill.
Lets just say your going to drive the crap out of it:2-in parallel IRLB3034PBF International Rectifier | Mouser
1049 Keystone Electronics | Mouser (I wouldn't attempt more than four and they should be all the same and all new)
MHP-TA15-9-77 TE Connectivity / Raychem | Mouser fuses(one for each battery)
Oh and a 15k resister for the mosfets (only need one for both mosfets)
You can use pretty much any switch. Should last a quite a while and be safe.

 

[pharryn]

if i just do lipos what would you suggest?

 

[edyle]

Any modders on here this morning that could help me out? Any direction i could get would be greatly appreciated

Well for what you're talking about maybe you'd be interested in what I do and just plug into the wall.

I actually only use 15 watts maybe 20 most of the time but my ac/dc adapters go up to 40 watts, and the voltage options are 3, 4.5, 6, 7.5, 9 and 12. magnetics usa is the brand.
Of course if you just jump to straight 12 volts as a power source things get a lot easier in terms of options on the battery side.

 

[dc99]

Honestly, lipo's aren't my thing but I will ask some friends for you. How hard are you going to drive this thing?

 

[pharryn]

Most of my builds would probably be around .3 to .6 where i usually build on my smy. It shouldn't draw more than 30 amps at 8.4 volts at any time but i would like to definitely like to have more than i need.

 

[pharryn]

i want to be able to take it to work with me and stuff, I'm in a work truck all day so wall plug wouldn't work edyle thanks very much for the input though.