DNA 30 mod project questions (Mamu's Arlo project)

[Taledus]

I have bought most of my parts to do Mamu's Arlo box mod. I would ask questions about it on that thread, but apparently I made someone mad earlier today when I did so I am starting my own thread that could have just been answered on the other one...

I have some questions about removing the on-board firing button. The guide says it is optional, but I have yet to run across anyone who has done this without removing the button, so I have no clue if it is going to work with it on, such as if it will fit in the box or interfere with anything by leaving it on. I do not wish to void the warranty if at all possible, while still getting the same final mod that is done in the project.

I would also like to find out if (10 Pcs Littelfuse PolySwitch SMD PTC Resettable Fuses 1812 3A 6V 1812L300MR | eBay) will work for the fuses on a DNA 30 board? The tutorial says 2 parallel for each battery, but I want to ensure that the ones I am getting will work for the needed reverse polarity protection.

I would also like to find out about the transistors on this page (http://www.e-cigarette-forum.com/fo...rse-polarity-protection-dna.html#post11776993) and installing additional LED's into the device for the reverse polarity protection. I have no idea which ones they are. I also do not know if the transistors and LED's would even be needed or useful.

I ordered a separate USB chip, but the instructions do not call for one. I believe they are using the USB port on the charging box itself but I have not been able to determine this for certain.

I would appreciate any help with these issues I am uncertain on.

 

[Taledus]

After a bunch of reading and several replies on pm's I have been told that the LED's are not needed and do nothing.

The fuses that I linked to in the op will likely not work for my purposes since I have to parallel them together. Going off of another post I am going to use the SI4477DY P-FET's instead. Someone else posted that they were also able to get a button LED to work, but even after the explanation I am still confused as to how it is supposed to be wired up on the button's LED posts.

Here is my redneck-schematic. If someone will take a minute to look over and suggest how to hook the button's LED up I would really appreciate it. The 10k resistior, 47ohm resistor, and PN2222A transistor are supposed to be for the button's LED.



Edit: I missed this part, the left leg on the transistor goes to the LED positive lead, but I am still unsure what the negative LED lead goes to. I cleaned up the first image, and tried to re-route stuff so it was a bit more clear where everything is going.

 

[Taledus]

Alright, JohnnyDill got back with me on the button's LED . The negative side can go to the atty or the battery negative.

When I get the remaining supplies in from China I am going to post up a tutorial for idiots like me.