Curious about these builds.

[BeOne]

Hiya,

I'm curious about what's going on in here. Anyone care to enlighten me, please?

I'm actually an electronics design engineer who designs lithium ion battery packs for a living. Not surprisingly high current high reliability 18650 cells. Fancy that .

Is it simply a P-Channel FET connected to a switch to ground to fire the 510 connector? I'm also assuming there's no battery management in these so you have to take the cells out to charge?

I haven't looked at what displays you're using but I assume these are designed for vape purposes. Chinese?

Does anyone have a schematic you can share?

P.S what does squonking refer to?

[Deleted]

Sorry you've lost me BeOne

[pipeman01]

where's @windows when you need him ?

[Bob]

Well I can answer the squonking one; instead of a tank on top of the mod, the juice is fed from a bottle inside the mod through a hole in the bottom of an RDA, you squeeze the bottle (called squonking) to force the juice up into the RDA then fire as normal, any excess juice not soaked up by the cotton normally goes back into the bottle. The mod with the bottle is called a squonker probably after the sound it makes.

[Perpetua]

Jun 30, 2016 21:00:53 GMT BeOne said:

Hiya,

I'm curious about what's going on in here. Anyone care to enlighten me, please?

I'm actually an electronics design engineer who designs lithium ion battery packs for a living. Not surprisingly high current high reliability 18650 cells. Fancy that .

Is it simply a P-Channel FET connected to a switch to ground to fire the 510 connector? I'm also assuming there's no battery management in these so you have to take the cells out to charge?

I haven't looked at what displays you're using but I assume these are designed for vape purposes. Chinese?

Does anyone have a schematic you can share?

P.S what does squonking refer to?

That bit I can do BeOne . . . . the rest is complete gibberish to me!

There is a juice bottle in the mod and you squeeze it to supply juice to your bottom fed atomizer. The squeezing action is called squonking.

One of the original ' Squonkers ' in action:

[Deleted]

This might help

[chykensa]

Jun 30, 2016 21:12:01 GMT @windows said:

This might help

Not much, @windows, but I'm glad someone understood the OP Horses for courses I guess!

[BeOne]

Thanks all for your speedy replies. Sorry to others if my question was too technical. It's wasn't meant to be

@windows thanks for that. So it is just a P channel with a resistor to tie the gate high once the fire button is released ensuring it switches off fully (keeps the power dissipated in the FET to a minimum during turn off time). Interesting. No protection in these whatsoever. Drive current is dictated by the resistance of the coil which, of course, means once the cells start to discharge the current will also decrease.

Next question. Since this isn't regulated does the vape start to suffer as the cells become discharged?

[BeOne]

Sorry looking at this again it is drawn as an N-Channel FET (source connected to ground). Not the way I imagined it although I have had some wine tonight

[Deleted]

Jun 30, 2016 21:20:18 GMT BeOne said:

Thanks all for your speedy replies. Sorry to others if my question was too technical. It's wasn't meant to be

@windows thanks for that. So it is just a P channel with a resistor to tie the gate high once the fire button is released ensuring it switches off fully (keeps the power dissipated in the FET to a minimum during turn off time). Interesting. No protection in these whatsoever. Drive current is dictated by the resistance of the coil which, of course, means once the cells start to discharge the current will also decrease.

Next question. Since this isn't regulated does the vape start to suffer as the cells become discharged?

You can put a couple of re settable fuses in the positive to 510 wires just in case.
Thats the only problem with an unregulated build, as the cells drop so does your vape.

[Deleted]

Jun 30, 2016 21:26:54 GMT BeOne said:

Sorry looking at this again it is drawn as an N-Channel FET (source connected to ground). Not the way I imagined it although I have had some wine tonight

although I have had some wine tonight never have known

[chykensa]

Ah, that must be my problem, I'm on my third glass of Shiraz!!

[joeten]

I will stick to building the odd computer or two, more room to work.

[igual]

Lots of schematics here www.modmaker.co.uk/Mod-Making-Information

With the pure unregulated builds the vape will decrease in quality when batteries drop to about 3.8 with parallel or 6.9 with series.
Much the same as a "mech" mod.
Regulated devices the vape stays consistent till battery cut off point.
Parallel box will last me a full day on 1 set of batteries.
If I'm using my series unregulated mods batteries last about 2-3 hours lol

[phtumshk]

I use mosfet mods a lot as I vape at 1 ohm at 3.7volts mostly.
Power does reduce as you use em but for regular MTL its not really a problem as such for me.
Head to head with a regulated device battery life is pretty much the same at 3.7V.

With regards to the P channel fets arent they permanently on needing a switch to turn them off?
Think thats why the Ns are used instead as there switch to fire.