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Is it possible to use a pot on an unregulated box mod

fightinggoat

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Saw a Lipo box at a B&M, it has a mosfet and no chip of any kind, but also has a potentiometer. I didn’t think you could regulate a circuit without a chip or pwm.

How is this possible? Is it some kind of rheostat that converts the battery power to heat before it reaches the atty?

It looked like a regular pot used in box mods.

It would be nice to be able to add one to my series boxes without the added expense and hassle of a pwm board.
 
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PoppaVic

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wtf? No. A rheo will act as a waste/sink of energy - releasing 0..100% to the other side. A Pot will split the energy - which is different form of waste/sink.

A PWM is just all-positive AC, in digital form. Dude, you are really confused.
 

PoppaVic

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I'm sure it is. And, yeah: I sympathize if you are expecting help at a B&M, but seriously.. A little google and youtube would help.

Personally, I am still waaaay leery of li-poly - and friends that are Apple fanbois don't even make me feel better... And those devices don't even draw like a vape would.
 

SteveS45

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Wow, talking about Mechs and Chips? Converting Battery Power to heat before the atty? And says they use Mechs? I think there is an award in store.....
 

r055co

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First off if it's got wiring, Mosfet or any sort of chips and electronic's it's not a Mech.
 

SteveS45

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Vapefaggot_ed0b75_5840459.jpg
 

fightinggoat

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First off, why all the hostility over a question?
I asked a question about a type of circuit I haven’t seen before and you guys want to bring out the pitchforks over the question and my terminology?

The B&M wasn’t selling it and I knew better than to ask him about it as the person in question has no idea about electronics.

I know what I saw, it was a very simple Lipo connector inside a Hammond box with a single mosfet and a pot. No other chips or boards of any kind.
That’s all I was asking about, not whether they knew what they were doing, or if it is safe, or if it is a mech, semi-mech, unregulated, DNA, yihi, tivo, dvr, or a 502 big block.

Sorry I asked. Would have thought there were more people who want to be helpful to someone with honest questions, should have remembered this is the internet.
Wait, should I have googled to see if this really is the internet first, wouldn’t want someone correcting me for not calling it the interwebz.
 

5150sick

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I know what I saw, it was a very simple Lipo connector inside a Hammond box with a single mosfet and a pot. No other chips or boards of any kind.

I've never seen anything like this before.

Unless they were showing off what not to do.
 

fightinggoat

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Idk, the pot worked, at least what I was told, it didn’t have a battery in it to see.

I just figured it was some kind of rheostat used to shed a little power off before reaching the 510. Transform some energy into heat to lower the voltage.

I have found similar circuits in appliances, but not in the vape world.
 

fightinggoat

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I doubt anyone asking how to put a pot on a mech tube could be taken seriously, I assumed people would know that I was referring to a box mod, especially since I made reference to a mosfet.

I have a mech box and the only difference is that the switch carries a load whereas my “unregulated” boxes use the mosfet to carry the load instead of the switch.

Whether it has a wire or a copper strip carrying the battery power to the attie doesn’t define mech or unregulated in my mind.
 
Having little or no actual spec to go by..
Its conceivable that he was attempting to use the pot to hold the MOSFET in a linear region, controlling the saturation and thus the output.. but the fet would need massive heatsinking to even considder it, and the thermal losses of doing so would just be a waste of power.
 

Zamazam

Evil Vulcan's do it with Logic
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If you are using the POT with the mosfet, well The mosfet is a substitute for a mechanical switch, so all the current does not dump through the switch. I would imagine that you would need a really beefy POT to regulate that much current. The by product would naturally be heat due to the regulation of voltage and thus resistance. Interesting concept,
 
I'd guess (given the lack of info) that the mosfet would be working in the ohmic linear, actually having resistance it's self rather than the pot. A pot controlling a gate wouldn't see much current if any, doubtful it'd get hot at all.
Really poor concept, it's an exercise in mosfet glowing lol. He should have wrapped some juiced cotton round that bad boy and vaped off it :teehee:
 

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