Kicks for diy mods

[RicModMaker]

I've just received my stepdowns from FT which I bought before I had any knowledge. Not that I've got much but I just checked the specs and they say something like 3-40v but Ive just realised it also says 3a output.
I was planning on putting 2 18650 in serial and using it to reduce the voltage but will 3 amps be man enough?
If this is my enough, which I don't think it is, does anyone know of a board that I can pull more power through?

 

[Gilliandrea]

@Seedy Most VV boards are 3amp rated and the lowest you can go is a 1.4 ohm coil
Just put 4.2v and 3amp into the ohms law calculator and you get the limits

Another board is the KIS-3R33S that can do 4amps so will allow 1.1 ohm coil

 

[Chegs]

Ask me nicely in a month or so and I'll have assembled a NAOS Raptor into a circuit. Like you, I've been looking for high current PCB's forever , and as they are rarer than hens teeth I've decided I'll build my own

Sent by lazer from just north of the world's largest nuclear dustbin

 

[RicModMaker]

@Seedy Most VV boards are 3amp rated and the lowest you can go is a 1.4 ohm coil
Just put 4.2v and 3amp into the ohms law calculator and you get the limits

Another board is the KIS-3R33S that can do 4amps so will allow 1.1 ohm coil

Pffff. 4 amps? That's buggered my plans! Thanks for the info though. It looks like I'm going to have to go straight for double power and up my ohms.

 

[RicModMaker]

Ask me nicely in a month or so and I'll have assembled a NAOS Raptor into a circuit. Like you, I've been looking for high current PCB's forever , and as they are rarer than hens teeth I've decided I'll build my own

Sent by lazer from just north of the world's largest nuclear dustbin

Pretty please bestest vaping friend. ;-)

 

[RicModMaker]

@Seedy Most VV boards are 3amp rated and the lowest you can go is a 1.4 ohm coil
Just put 4.2v and 3amp into the ohms law calculator and you get the limits

Another board is the KIS-3R33S that can do 4amps so will allow 1.1 ohm coil

So with these 3 amp limit boards, I can only get 12.6 watts with a 1.4ohm coil with a single battery ;(
I'm glad I asked though, its good to know.
How do the kicks pull more power out of a single battery?
Is there a board that does the same?

 

[Gilliandrea]

Depending on the board DC to DC for VV, say it is like the LM2596, you can only use serial battery configuration, input from 4.5 to 40v (single battery can never give 4.5v) and output will be from from 2.5 to 35v - the output will be from 2v lower than the input, this is a step down module (buck), even though it can also be turned up. - examples on Stealthvape website

A boost module, not seen one for a while, but the Vamo PCB incorporates it using batteries to offer 3w to 15w etc and keeping the battery consistent but not allowing a coil below 1.2 ohm, but again there are limitation because of the costs involved.

 

[gords1001]

Dna20, dna30. Neither is an especially cheap option and you can get much higher wattage from a mech or mosfet set up. Your main difficulty is you want adjustability on the fly, chegs raptor board offers that snd much cheaper than a dna20, however, it must run either a 7.4v or larger lipo pack or at least two cells in series (4.5v input minimum).

Personally I would opt for a 2s or 3s lipo pack and treat myself to a hobby charger, they are not all that expensive (although you will need a good 12vdc power supply) and you can also build round cell cradles to balance and fast charge round cells for other mods, they are also invaluable for seeing if you have been sold real cells or not - discharge a cell then charge it and see how many milli amps go back in, it should be within a couple of hundred milli amps of the rated cell capacity.

One thing that irritates me about the evolv boards is their stupid, short sighted 4.5v input limit.