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Variable Voltage Evercool Copper Mod

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Breaktru:
Variable Voltage Copper Mod. 3.6volts to 6.14volts with (2) 3.7v 18350 1200mah UltraFire batteries (7.4v).
Right click on image and click "View Image" for full size photo.
V.V. on far right:


On the bottom of the tube I cut a right angle grove to lock the cap in place.
I cut a 1/4" of tubing for battery stop. See diagram: http://breaktru.com/images/copper_mod.jpg



I used a 96% efficient switched regulator: http://focus.ti.com/lit/ds/symlink/ptr08100w.pdf


3 amp CK switch - 200 ohm variable resistor in series w/ 240 ohm resistor.
(2) 100uf - 10v Tantalum caps


Collar used to lock top of batteries from moving. Punched dimple into side of tubing for collar stop.


Pressed collar in place with a socket






Low end voltage


Sweet spot voltage


High end voltage


Your fixed resistor will set your max voltage for the PTR08100W
With the pot zeroed out, the fixed resistor gave me a max voltage of 6.1volts


Circuit below only visible to logged on members.........

DRA:
Wow dude that's awesome. Nice pix

wwwest:
Make me one. I've got to have a variable volt copper mod. My dream come true. I'll pay you what ever you want. I made a 3.7v copper mod but I can't fit the parts in the tube to make a V.V.

FluGlone:
Count me into. I just PM'ed you with an order. I'll even take a 3.7v copper mod.

Brian9523:
Breaktru, simply amazing. I also have to have one. Put me on your order list. I'll send you my info. How much?

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