1KAm's Current Regulation MOD: Any Interest?

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1KAM

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Sep 11, 2014
33
24
Cleveland
Hello All,
I've been away for a while, working on projects, plowing through school, you know the deal. Well, probably.

Anyway, over the past few months i've been working on the design of a rather interesting sort of power supply, which is a part of a larger project, non e cigarette related. I can't talk about it much, though.

Regardless, I now have a working design of a remarkable sort of amplifier topology which I have been perfecting for that time. With a buck-boost power supply, some OP-amp based feedback, and some 1kam electronics magics, I have a breadboarded circuit which can precisely control the current flow through any arbitrary load (from 0 ohms short on up.)

I think that a regulator of this type might be advantageous to the e-cigarette world. For one thing, it would mean that the power out of the battery could be constrained to a known maximum amperage instead of regulating by voltage. For another thing, given that P = (I^2)*R it makes more sense to me to attempt to regulate current flowing through a resistive load than regulating the voltage across it (which is a crude form of regulating current when one assumes that their coil stays at the same resistance (( which it most certainly does not))).

Anyway, I could build a trial of this and see how it works, if anyone has any interest in me doing so. I think I could get the technology for this squeezed down into a metal barrel about the size of a rda, though the barrel itself will have to do some heatsinking... shouldn't be too bad.
 

1KAM

Full Member
Sep 11, 2014
33
24
Cleveland
Okay, I have a schematic whipped up. From what I can tell, I can squeeze this into the size of an 18350 battery without too much hassle, and provide current regulation into the coil with just 6 components, one transistor, one chip, three resistors, and a trimpot. I might be trying this out today... we'll see how far I get.

I think this has implications to mod safety as well. With current regulation, one can make sure that regardless of coil resistance given, (even if it shorts), that the draw out of the battery won't be severe. If I like how this turns out I might consider making it into a product.
 
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