THE PCB BOARD ON A KBOX

[IMADADDY]

Hi,
I have recently came across an old beat up kbox, and took it apart and started tinkering with it. So my plan is to build a box mod around this chip. My main question is can I bypass the standard wattage intervals 7,13,20,25,35,40 if I solder in a 200ohm potentiometer in the place of the wattage switch on the board. Any help would be appreciated and sorry if i'm in the wrong section I have never used a forum in mylife.

 

[Bunnykiller]

all depends on exactly what is the driving factor behind the switch... it could be several resistors limiting the input to the PWM. Not knowing the value of each setting would make deciding what pot to use somewhat difficult. Who knows, maybe the lowest watt setting could need a 1M resistor... figure out what the switch funtion range is and you just might be able to use a pot in place of the multi-position switch

 

[gandymarsh]

That is an interesting question. I think you can ask here Modding Forum A moderator might move this post there for you.

 

[suprtrkr]

I don't know the answer, but I'd think so. Those chips usually work by putting resistance into signal to tell the board what voltage to apply. As @Bunnykiller says, you'll have to select a pot that a) can carry the required current and b) covers the required resistance range. I'd suggest you breadboard it with a variety of fixed value resistors, see what voltage you get out of the machine (operating, of course, under the assumption anybody willing to attempt the task both has a DMM and knows how to use it, lol). You might have to series a couple of pots to manage the required range and still have a reasonable adjustment ratio. You don't want to jump a whole volt just breathing on the dial. Which leads me to wonder why Kanger did it that way in the first place. If, for example, the voltage changes as a logarithm of the resistance, that might be hard to do...

 

[Robert Cromwell]

Naah won't work. It is computer controlled.

 

[Robert Cromwell]

Here is a replacement 50w control module for a Kbox mini at fasttech. 11.04.
$11.04 Subox Mini 50W Styled VW APV Box Mod Control Module - 7-50W at FastTech - Worldwide Free Shipping

 

[IMADADDY]

thanks for the help, I ordered a few pots today and we will see in a week or two. My purpose was to reuse the board instead of thow it away, but the voltage steps are killing me(bad idea kanger) I personally think i'll have to have pots in between the resistors to adjust it, witch is fine because all i'll need is 2 25-30 and 30-35 thats where i vape we will see? I didn't want to start unsoldering the board to get ride of resistors that will prolly cause me problems. I guess it all depends how much i can live with.I'll keep you all posted either way. It will work or i'll trash the board

 

[suprtrkr]

thanks for the help, I ordered a few pots today and we will see in a week or two. My purpose was to reuse the board instead of thow it away, but the voltage steps are killing me(bad idea kanger) I personally think i'll have to have pots in between the resistors to adjust it, witch is fine because all i'll need is 2 25-30 and 30-35 thats where i vape we will see? I didn't want to start unsoldering the board to get ride of resistors that will prolly cause me problems. I guess it all depends how much i can live with.I'll keep you all posted either way. It will work or i'll trash the board

Good luck. Let us know how it worked.

 

[lamarrk]

Moved to the Modding Forum.

 

[Grimwald]

BTW the lowest on that is 8 watts not 7. Doubt if that matters.