Cheap, ready to go variable voltage modules..

[ericdjobs]

I was looking at ebay, and noticed an abundance of cheap, ready-made variable voltage modules from china.. I was wondering if anyone has looked into using one in a mod? A good majority of them support up to around 15-18 watts with 3A max... just curious, beacuse with the prices I'm seeing, they seem pretty damn cheap compared to say, the OKR chip alone.

LM2596 DC-DC StepDown Adjustable Power Supply Module | eBay $4 shipped

Oh, and I was also curious about some boost modules I saw... they are a bit pricey.. but the ones based on the LM2587 seem to support 20-30W max (claims vary depending on what board you're looking at) and up to 5A (not continuous) example: LM2587 DC-DC Step-Up Module | eBay


These modules just look very easy to work with for someone just starting to mod... I haven't soldered in 6-7 years now, so I really liked the idea of everything already out together... even if they are a bit large.

 

[mj64]

Sure, lots of them have been used. Here's a great one by mamu. http://www.e-cigarette-forum.com/fo...6-very-easy-vv-mod-w-switching-regulator.html

You're right, size can be the issue and that's one of the reasons why everybody doesn't use them.

 

[CraigHB]

That booster has good output, but as already mentioned, it's on the large side. Of course, the fact it needs a heat sink sort of makes you wonder about the efficiency. I have yet to see a booster module for sale with high output that is small and efficient.

 

[Rocketman]

High power boosters usually are bigger than we can use in e-cigs. Except in the big boxes :.

That one is way to big though and the first one won't BOOST. Output is lower than input.

If you want power in a small size, this might work. You would have to add a small trimmer to it but would still be small.

http://www.murata-ps.com/data/power/okr-t10-w12.pdf

This won't BOOST either.

10 amps ought to take care of a double barrel Low resistance Dual coil running on 6 volts, LOL