Question about negative voltage, and illuminated switch (DNA40)

[chefjoosie]

Hello, I'm getting ready to put together a DNA40 mod in a style and with a switch very similar to JohnnyDill's here at:
http://www.e-cigarette-forum.com/fo...-led-button-switch-vw-mod-2.html#post12992454

I've used the wiring suggested in that thread by Vapant in 2 vamos and a DNA30 with good results, but the DNA40 has negative voltage and ground that goes out to the atty instead of the standard + and -. If anyone could suggest a wiring diagram that would work for me, ( to have the switch illuminate when firing) I'd appreciate it.

Here is the diagram I used for the switch's light on the vamo/dna30 builds:
View attachment 397472

And here is the layout of the DNA40:
View attachment 397473

Thanks in advance. I read up some on negative voltage, but either I need to read a lot more, or I'm just too much of a cave man to get it

 

[chefjoosie]

After some tinkering I got it working. For anyone interested in illuminated switches on DNA40, I used the same diagram/parts that I used previously on DNA30/VAMO, but just moved the 10K resistor off of the Attomizer+, and onto pin4 (fire-). The rest of the diagram stays the same.