My newest Dual Voltage (3.7v and 5v) Box Mod

[theECB]

Been wanting to make this for awhile. Finally got around to doing it. This mod includes the following parts/features.

3xAA White Battery Box Case
2x 14500 Protected Li-Ion batteries (900Mah)
TI Booster Chip
Switch to Select Voltage
5mm Fast Change LED

Here are a few pics of the finished mod. I love it!

I still haven't added a master on/off switch yet. But I was just so excited that the damn thing worked and was wired correctly that I glued it up and started vaping!!

Hope you enjoy. Keep modding fellow ECF'ers!

 

[theECB]

Hopefully I can draw up a decent diagram to help out those that are interested. This place has been awesome and I want to give back as much as possible.

 

[driptip]

That is sweeeeeet! I like it alot ,is there any way to add a USB charger?

 

[doots]

very nice mod..

 

[misterD]

GREAT mod! GREAT pics too. very detailed! these caps keep me from doing it... too fudging big. if you put the 2 of em together they're bigger than the board itself!

 

[Connman]

Now that hmm can you fit a juice bottle in there anywhere?
You sure used up that center battery spot. looks pretty tight and you did a great job. Can`t see myself ever going back to 3.7 volts now that all I use is my 5 volt but just incase I would love a diagram on making this.

Thanks in advance.

 

[theECB]

Hopefully I can draw up a decent diagram to help out those that are interested. This place has been awesome and I want to give back as much as possible.

Honestly, it's pretty packed in there. I don't think you would be able to get a onboard USb charger in there. Perhaps a mini USB jack for a balance charger?

 

[theECB]

GREAT mod! GREAT pics too. very detailed! these caps keep me from doing it... too fudging big. if you put the 2 of em together they're bigger than the board itself!

Thanks misterD! I wasn't sure on the caps but I started with the idea in mind of making a mod that would last and if the specs called for caps (from radioshack) I though I should include them. I wasn't sure if they would all fit but it worked out. I kept wondering if there was a smaller alternative to those giant caps myself?

 

[theECB]

Now that hmm can you fit a juice bottle in there anywhere?
You sure used up that center battery spot. looks pretty tight and you did a great job. Can`t see myself ever going back to 3.7 volts now that all I use is my 5 volt but just incase I would love a diagram on making this.

Thanks in advance.

Connman, I wish!! Been eyeing a bottom fed juice box for awhile now!

I wanted to have the 3.7 option because I have been popping atties like crazy at 5v lately! Bought a brand new 901 atty and enjoyed all of 10 pulls before it popped! Plus not all 3.7's are created equal. I read all the time on here about how we over stress our batteries in there mods. I figured the greater amp draw from running them in series would help out with the 3.7 experience. Help that voltage reach it true potential if you will...

Plus I actually kind of like the 3.7v as a change of pace. You still need to take a good primer puff, a good nasal exhale, but then it really cooks!

Anyway, like I said, I really love the ECF and will get together a diagram ASAP and show the wiring.

 

[misterD]

im not sure on how to wire the switch to go 3.7 to 5V. if you can help with that... and which switch u used too.
i think 3.7 (4.2) and 5V is all we need. everything in between doesnt matter much (thinking about adding all those resistors fistpack style would be too much). and thanks for posting, again!
i have some juices (coffee flavors) that taste crappy at 5V

 

[WillyB]

Been wanting to make this for awhile. Finally got around to doing it. This mod includes the following parts/features.

3xAA White Battery Box Case
2x 14500 Protected Li-Ion Batteries (900Mah)
TI Booster Chip
Switch to Select Voltage
5mm Fast Change LED

Here are a few pics of the finished mod. I love it!

I still haven't added a master on/off switch yet. But I was just so excited that the damn thing worked and was wired correctly that I glued it up and started vaping!!

Hope you enjoy. Keep modding fellow ECF'ers!

Quite nice. To me the kill switch is a non issue. I never use mine (a quick twist of the atty works fine).

Where did you get the white box?

As far as the caps, FWIW, the spec sheet calls for low ESR. They can be had here:

Digi-Key - 495-1529-1-ND (Manufacturer - B45197A2107K409)

As far as size here is some of Tinear's work.

 

[misterD]

got my caps and slide switch now i have to figure out how to wire the switch. the caps i got are 100uF 16V. arent they good enough?

 

[WillyB]

got my caps and slide switch now i have to figure out how to wire the switch. the caps i got are 100uF 16V. arent they good enough?

Like I said the TI spec sheet calls for the LOESR type. According to Nuck (Mr Fistpack) he claims the correct LOESR's makes a difference. But FWIW the maker of Nhaler's Woody claims with a LiMN battery he uses none.

 

[CloudBurst]

Nice mod! I'd like to know how to wire 5v/3.7 also, never made one but would like to try someday.

 

[Badass45]

Hope you are not pulling the 3.7 volt off of one of the two batteries as you will unbalance your 2 cells and when you go to using 5 volt after using 3.7 it could cause problems with the cells not being balanced.

 

[theECB]

Hope you are not pulling the 3.7 volt off of one of the two batteries as you will unbalance your 2 cells and when you go to using 5 volt after using 3.7 it could cause problems with the cells not being balanced.

Badass45,

No, I am not using a single cell to pull the 3.7. There is a wire connecting the two positive leads on the batteries. The batteries discharge at an equal rate.

Attached is the best I can do for a wiring diagram. As you can tell from the pics it gets kind of messy and drawing out the wiring makes it impossible to see what the heck is going on.

So....let's connect the dots!!

Here is what each component is.

1,3 Battery
2,4 Battery
18 Atty positive center post
19 Atty ground (outside of connector)
5,6,7 A simple slider switch from RadioShack with two positions and three solder points
8,9 A horn style 3a switch from Madvapes
14,15 Cap #1 (15 is the negative lead)
16,17 Cap #2 (17 is the negative lead)
10,11,12,14 TI Booster Chip (10=ground, 11=Voltage in, 12=Voltage Out)

Now that we've identified the components...here are the points that must be soldered together to finish this mod.

Connections:

1 to 2 - Connects postive battery terminals
3 to 4 - Conects negative terminals (place a switch here for master on/off fuctions if desired)
1 to 5 - Positive lead from battery to left side of slider switch
6-8 Center pin off slider switch to left side of momentary switch
9 to 18 - positive lead of momentary switch to positive atty center post
4 to 19 - negative battery terminal to outside of atty connector

...this should complete the 3.7 volt side. Now for the 5v wiring

2 to 11 - From right pos battery to Vin on Booster Chip
12 to 7 - Voltage out from Booster Chip to right side of slider/selector switch
14 to 12 - Cap #1 pos lead to voltage out pin on Booster
15 to 10 - Cap #1 neg lead to ground pin on Booster
17 to 10 - Cap #2 neg lead to ground pin on Booster
16 to 11 - Cap #2 pos lead to voltage in pin on Booster

.....your finished!!!!! I think Let me know if I left anything out or if someone has a better way to draw this up then connect the dots!

PS, I also added an LED off of the 9 position and ground it to 19 of course.

Enjoy!!

 

[Connman]

Thank you theECB,
Looked that over and got it saved now. Seems easy enough to follow and great job providing that for us. Much appreciated.

 

[tattoo131313]

Looks good. Do you have a link for where you got that box?

 

[theECB]

Thanks! I do. It's from Madvapes.

3 x AA Battery Box, White