Built a UCC283T-ADJ LDO regulator Snus Tin Mod

[Dothan]

I found an old thread, and borrowed Mamu's wiring plan, and put together a VV UCC283T-ADJ LDO regulator snus tin this morning. It has a larger range than I need, so is good... playing, I've got as low as 2.3 and up to 8.4 volts. I've vaped with it for several hours at 4.2, with a 2.4 Evol, and the batteries are holding well.

 

[Dothan]

This is another retired mod... the UCC283T-ADJ LDO regulator produces a good, consistent vape, but in a Snus box, nested between two batteries, the heat it generates is scarey! My concern is when you hit the mod for two or three hard hits, even with heat sink, it's heating up the batteries quite a bit... That can't be good for battery life or safety!!! Oh well, the fun's in the research, and building, back to that again!!! Any recommendations are welcome! I'm being realistic, I want to build a DNA, but until I get more positive of my building skills, I'm not risking $50 to a slip of the soldering iron

 

[dr g]

I was going to ask about that, those batteries aren't really ecig caliber. But I couldn't really decipher the datasheet of the regulator you were using. I can't reconcile the voltages you got with what the datasheet says.

 

[Dothan]

I was going to ask about that, those batteries aren't really ecig caliber. But I couldn't really decipher the datasheet of the regulator you were using. I can't reconcile the voltages you got with what the datasheet says.

Ha! old batteries from the back of a drawer. The Snus tin is a cheap box for experimental building... under 3 bucks and dump.. just is limited to small batteries... even if not a ecig caliber battery, they were good enough to test the chip with... if it wasn't a furnace, size wise and price wise, it would have make a sweet dual 18650 mod! Data sheet, I'm not sure, just reading my meter...

 

[dr g]

Er ... you used this regulator without knowing what it can do?

 

[Dothan]

no, I knew quite a bit about the regulator before ordering it. I also knew that this regulator was safely utilized by multiple respected mod builders, you might scan the forum for a document "Double 18650 VV Regulated Flip-Top Mod" by Mamu. I felt comfortable enough after reading through that and several threads on this and other forums that I frankly did not feel the need to memorize the data sheet, I reviewed it, and my limited knowledge, I went forward feeling comfortable with the regulator. If you look at the pictures that I posted, the voltages I mentioned are showing... Just because a device has a range available, certainly doesn't mean I will use it... that said, it is disassembled and all the parts setting ready for my next build in my quest for the mod that makes me happy...

 

[DrMA]

The UCC283T is a linear regulator best suited for low input-to-output differential applications. Because it dissipates excess voltage as heat, it will overheat quite easily when you're inputting 7.4V (nominal) and setting the output to 4V. Let's say you vape at 3A, then the voltage difference of 3.4V would generate 10.2W of heat. That's enough power to vape on

 

[Dothan]

Thanks DrMA!!! you have me thinking!!! I have a couple heavier Aluminum cases... if I were to use the case itself as the heat sink, away from the batteries, it well might still be a nice mod! Gives me a thought to play with the next time I find time to play...

 

[dr g]

I don't think you want to be losing 10 watts to heat no matter what ...

 

[iamlenb]

It may yet find use as an Alaskan or Northern Canadian as the "New Dual Use Arctic Blast, the Hand Warmer AND Pocket Vaporizer!"

 

[TomCatt]

Check out the LM2596 thread around here somewhere. They're a bit large; but a plug 'n play VV module that works quite well.




Sent from my iPod touch using Tapatalk 2

 

[Phestr]

I built this using the instructions in this post: http://www.e-cigarette-forum.com/forum/modding-forum/191607-easy-okr-t-vv-mod.html

Super easy, and not very expensive using the parts in that thread. VV, and since it's a switching regulator, virtually no heat. And the batteroes last me about 2 days of medium to heavy vaping.

 

[Dothan]

I have read the LM2596 thread end to end more to once, and have built 4 LM2596 Altoids Tin boxes all given to friends, and have a desktop LM2596 in a Radio Shack project box that has a 19.2 volt computer power supply powering it. I want to build smaller... the LM2596 is great, but the size of box required is my only issue. I had built straight battery boxes using eclipse tins and external battery boxes, but want to have the flexibility of VV, without carrying a brick. I'm realstc, I can't see myself laying out 50 dollars for a dna, that my sausage fingers would more than likely break the cable before I got the box completed, so reading through the threads for alternatives that fit my current build level and not drive my wife crazy on how much money I dump into my quest. I'm thinking a ork-t for my next project, similar to Phestr's.