Modding w an eGo pcb...

[jasl90]

Just completed my first mod...


Pretty simple design really.
It's an eGo pcb from Smoking' Vapors, a AA flashlight from madvapes and a 14650 protected battery.
The tricky part was cramming everything into the tube... Considering that an 14650 1.5 x longer than a standard AA battery.

For the most part it works fine... As long as I use a 2.8 ohm atty or higher.
The problem is when I try to use a 2.2 ohm (or lower) atty.
When I try using the lower res attys it simply blinks 4 time and goes dead.
I did figure out how to "trick it" into working w/ a lower res atty by unscrewing the the atty, just enough the break the positive connection... Hold down the power button, and screw the atty back down to complete the circuit.

Is there anyone out the who has any experience modding w/ the eGo pcb who knows what I might be missing?
I have a few eGo style batteries and none of them have a problem w/ the low res attys so I'm 99% sure that that there isn't minimum ohm specification.
Thought maybe it was the fact that the 14650 has a peak voltage of 4.2V and was causing an over amp, but it's doing the same thing at the 3.7 nominal voltage too...

Maybe got something too hot while soldering???

Anyway, I'm open to any and all suggestions.

Thanks,

Jason

 

[MattyT]

Just wanted to say welcome to the ECF. You came to the right place to get an answer, I unfortunately am not the one to help you but I know someone here definitely will!!!

 

[jasl90]

Thank you for the warm welcome. I've been reading this forum for quite awhile now and figured this would be the best place to find some answers.

 

[Tiesel]

Clean looking mod, If you try to take a LR 1.5ohm atty beyond 4v your just asking for trouble. LR attys were designed to up the production over 3.0ohm attys in low voltage devices. If you try and push higher voltages through a LR filament it will blow just like a fuse. Its a thinner more conductive coil to allow a battery @ 3.7v to flow more energy, but if you push too much through it, of course it will fail.

 

[jasl90]

Thank you for the compliment.
I've actually been using using a LavaTube since December of last year (about a week after they were being sold on the Volcano site. So I've had plenty of experience trying lots of different cartos at different voltages...
It's just been here recently that I've caught the modding bug and wanted to see what I can come up with.
I'm well aware that trying to pump too much voltage into a low res atty will fry the coil but 4.2 volts into a 2.2 ohm carto is still under 2 amps (1.909) and 8.2 watts... No problem for that atty.

In fact the low res attys & carts were designed for use on eGo style batteries.

Still not really the issue anyway... I'm just puzzled by the fact that a low res atty that works just fine on any of my eGos won't work on this mod, considering they have the same internal circuitry.

 

[Tiesel]

Thank you for the compliment.
I've actually been using using a LavaTube since December of last year (about a week after they were being sold on the Volcano site. So I've had plenty of experience trying lots of different cartos at different voltages...
It's just been here recently that I've caught the modding bug and wanted to see what I can come up with.
I'm well aware that trying to pump too much voltage into a low res atty will fry the coil but 4.2 volts into a 2.2 ohm carto is still under 2 amps (1.909) and 8.2 watts... No problem for that atty.

In fact the low res attys & carts were designed for use on eGo style batteries.

Still not really the issue anyway... I'm just puzzled by the fact that a low res atty that works just fine on any of my eGos won't work on this mod, considering they have the same internal circuitry.

Bro... since you like to mod, I will give you the 1 tip you need to make an awesome mod.
We want parody, we want our mod to have safety backups (related to the battery) and backups of those backups and then you guessed it another backup.
Also we want a mechanical "master" on/off switch.
Also don't forget the vent holes..

 

[Slim Batz]

Maybe the 14650 battery is capable of maintaining a higher voltage under load than whats in an ego, thereby increasing current and triggering the protection circuit ... just a guess.

 

[jasl90]

Got it covered. Using the eGo pcb, it has the "5 click" off/lock. As for vents... The whole bottom is a vent.

 

[jasl90]

Slim. I was thinking that myself... So I drained one of the batteries down to 3.7 volts and I'm still getting the same result.

At this point I'm thinking that I either allowed too much thermal transfer when I soldered the leads.
Either that or the pcb can't disipate heat from the back of the board after I epoxied it to a piece of perf board.

 

[Tiesel]

Got it covered. Using the eGo pcb, it has the "5 click" off/lock. As for vents... The whole bottom is a vent. View attachment 90054
View attachment 90055

5 click on/off is weak. Need a physical switch, something big,that operates on a single click and isolates the battery.

 

[Slim Batz]

Well, you have enough posts now ... maybe move this question over to the brainiacs in the modding forum....

 

[jasl90]

Just looked at your profile. Looks like our kits have a lot in common... LavaTube & eGos.
None of those devices have physical switches to disconnect the battery. Come to think of it, I can't think of any commercial mod that uses them.

If I were using a straight, 3 amp switch between the battery and atty or a simple tack switch/transistor combo, I'd be be with you 100% but with the safeties built into that pcb, I don't feel it's necessary. Besides putting the bottom switch back in would eat up too much space and plug the button vent. I wanted to get away from the 14500 battery and avoid drilling side holes.

 

[Vaptor]

Love the "POLICE"

 

[ntroutzos]

i have tried ego circuit and dosen't work well