Booster V.V. Copper Mod w/ Digital Potentiometer

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breaktru

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Thank you guys. Couldn't have done it without the ECF members support and ideas.

asdaq, I would have to take it apart for photos. Had to cram the circuitry in to fit it into the smallest possible tube length. It's shorter than my Evercool V.V. tube by 1/4". Everything is hard wired. There are 5 sections and 4 are hardwired.
 

breaktru

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Yes Rockproof I used one 18650. I cut the pipe between the sleeves a little shorter.
This is what I used:
Copper V.V. Mod. Using One 18650, 3.7v. battery Incorporated the PTN04050C regulator and a DS-18689-100 Digital potentiometer.
Voltage in = 3.7v to 4.12v, Voltage out = 3.24v to >6V
PTN04050C.jpg
 

breaktru

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Real nice tru, have you changed the locking system to scoring the inner pipe with the pipe cutter? I'm curious how effectively this secures it.

Hey Asdaq, I found that the scoring did not make a difference and the mesh up was not tight enough. What I did was ever so slightly deform (not noticeable) the coupler edge that fits over the pipe sections. All you have to do is give it a twist and it holds tight. Another option is to not file all of the burrs on the the cut edges of the pipe and leave a very slight lip.
I don't have a large battery spring like my other mods that would push the couplers apart. At first I measure for and used a magnet at the base of the battery but after a couple of days I found that using a weak copper spring which I crushed down to fit worked better. So far so good.

An important note Asdaq, Don't use those tiny digital meters to set voltages, It causes the D.P. chip to lockup. If I scale down to 3.24v it gets stuck there and have to power down. My multimeter works fine on it. So the draw back is putting the circuitry into a box mod with one of those digital meters.
 

breaktru

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Asdaq, The rounds are for bullet proof testing the .40 cal is deflected but .44 mag goes right thru. :laugh:

I used 4 short pieces of pipe and torched and soldered using just a drop of solder on one end of each pipe.
Like I mentioned in a post somewhere, the edges of the couplers are slightly out of round for better locking by just using a slight twist.
 
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