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Using a dead connector and other noob mod questions

Discussion in 'Battery Mods' started by Walrus, May 30, 2009.

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  1. Walrus

    Walrus Ultra Member ECF Veteran

    Mar 3, 2009
    Baton Rouge, LA
    Ok... so I'm not used to being such a noob at anything... but we all gotta start someplace, right?

    I'm planning a mod, and while I'd like to get all newfangled with RCA connectors and such, I'm going to go a simpler route and just take a connector from a battery or usb-passthrough.

    Here's my question: Is it ok to use a connector from a dead battery/passthrough?

    I figure I'm going to remove the connector and try to keep the wires intact since my soldering isn't great anymore (my disability doesn't give me very steady hands). I have a couple batts, but will probably use a dead pass-through if possible.

    Thanks :)
  2. ApOsTle51

    ApOsTle51 Moved On ECF Veteran

    Aug 29, 2008
    yes you can :)

    click my sig linky links ;)
  3. billyboy689

    billyboy689 Senior Member ECF Veteran

    Aug 29, 2008
    ooh yeh , nice neat work apostle
    heres me showing off my simple lowly hidden by heatshrink effort
    here is what you will find inside youre average passthru
    a lot of stuff that just seems to break eventually

  4. Walrus

    Walrus Ultra Member ECF Veteran

    Mar 3, 2009
    Baton Rouge, LA

    The connector is the part I'm not so sure about. I imagine that once I get it out with the wires intact, I just place it in the circuit, correct? Battery source>low voltage regulator>momentary switch>connector>Battery source?

    If you've used the low voltage regulator before, where would I ground it to? I've never done electronics with a battery source before... I'm used to PC's and such.

    I guess I just hijacked my own thread :)

    Oh... and what guage wire would you suggest for the project? I'm going to run two 18650's in series (I guess around 8v at full charge) to a 5v low voltage regulator, a 1A momentary switch, and the connector from a passthrough.
  5. Paradiso

    Paradiso Senior Member ECF Veteran

    Apr 19, 2009
    MA - USA
    Walrus, in my limited experience, I would be surprised if you removed the connector with the wires intact. The wires are very tiny gauge. With the 2 batteries that I scavenged the connectors from, the wires snapped as I pulled the connector from the casing.
    With the 401 connectors that I'm using (tiny), soldering the wire to the center post was the most challenging. You can push the center post completely free of the connector, solder the wire (very carefully and without filling the center hole with solder) and then push wire and center post back through.
    Hope that helps (or at least doesn't make it any more confusing)

  6. Fox3

    Fox3 Senior Member ECF Veteran

    Mar 24, 2009
    Seattle, WA
    Hey Walrus,

    Yep, gotta start someplace.

    Presuming 3.7 volts for the battery and 3.6 ohms for the atomizer coil resistance, using ohms law you get (E=I*R) or in this case we want current flow so it is (I = E/R). E for voltage, I for current and R for resistance. We know resistance and voltage.

    Therefore 3.7/3.6 = 1.027 amps.

    With a 5 volt supply we get (I=5/3.6) 1.388 amps

    Wire size table can be found all over the net :), using this one for example 1:

    American Wire Gauge table and AWG Electrical Current Load Limits

    And figuring that AT LEAST a 50% safety rating (I like 100% myself :) we end up with 27ga (~=+50%) or 26ga (~=+100%). You could go with the power transmission column but I don't think that is necessary. I'm running with whatever size comes with the USB plugs I cannibalized which seems to do just fine.

    You can substitute for the values above if your power source or atomizer resistance is different, of course :).

    The two 801 passthroughs I build are doing fine a couple months later, but I will say that I probably should have skipped the 1N4004 diode I put in the last one to drop the voltage from 5V to 4.3V.

    My next project is a 510 passthrough, so far extracting the connector is being problematical, the old use the atomizer trick to get it out ended up breaking the atomizer :). Going to try the hot air solderer and if that doesn't work I'll mill the casing off.

    Fun ain't it :)!

    I think I got this right, but it is too damn early and only the first cup of coffee and first cart of 24 marlboro :).

    Hope this helps.
  7. cddz

    cddz Supplier's Manufacturer - Offline ECF Veteran

    May 14, 2009
    Newark, Ohio
    The 510 is a pita to remove the adapter, still working on it as i drink my coffee and read this forum.
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