Homemade Hybrid Boxfet

Discussion in 'Home Brew' started by blujeenz, 1/12/15.

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  1. blujeenz

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    blujeenz Loafing since 2013 ECIGSSA Donor

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    Drawing inspiration from all the DIY'ers here led to this hybrid boxfet, hybrid in that Im using a mechanical button made from a mother of pearl bead, which is glued onto an aluminium rivet. This presses a lever style micro switch on the gate of a IRLB3034 mosfet.
    I used an on/off switch to supply power to the fire button as well as monitor batt voltage, this can be seen in this thread http://www.ecigssa.co.za/a-simple-2-led-battery-voltage-monitor.t16516/
    I routered out Pau-Marfim for the wood body and used magnets glued to a stainless steel plate for the door.
    front  legends 1.jpg

    The bottom with on/off switch
    bottom 1.jpg


    The firing button and green on led, red on the left for low voltage. The hippy design around the button was burned with a soldering iron.
    Some imagination should reveal "jumping for joy". :)

    front edge green led.jpg

    My freehand engraving on SS plate, hammerite black for the eagle and coated in Liquid Glass. The LG gives a nice depth with semi rounded edges.
    I first brushed the plate down with a pot scourer, then chucked a disc of scouring pad into the drill press to create the sun and then engraved the eagle last.
    The white V on the back is to represent the Black eagles on Table Mountain, where I saw them although they are found elsewhere. :)
    Needless to say I have new found respect for tattoo artists.
    pose front 1.jpg


    The insides, silicon tube for button return spring, a bit stiff but works for the meantime, 10A auto reset on the pos batt and coil. Battery contacts cut out of copper plate with 2 x 1mm dia solid bare copper wires twisted together and shrink wrapped for the power wiring.
    wiring 2.jpg

    Another inside view with 18350 battery installed.
    open 1.jpg

    Alas the fire button had too much overhang and was binding, here I tried a very nice spring which I wound from SS fishing wire.
    spring 3.JPG

    Eventually I sleeved the wood with brass, desoldered the micro switch off the mosfet and hot melt glued it into direct contact with the fire button, probably how I should have designed it in the beginning.
    brass sleeve.JPG
    direct contact switch.JPG


    Here's how it started, the block was halved once all the drill press clamping was finished.
    510 and block.jpg

    510 connector soldered onto the solid brass base, a brass countersink machine screw will be the neg path to the mosfet.
    510 soldered.jpg

    A quick dry fit.
    box and 510 1.jpg

    Patina'd 510 base plate coated with clear finger nail base coat, came out a lot darker than I wanted.
    510 patinad.jpg

    Finally, my mixing bowl vacuum chamber with a 15mm thick perspex lid. The pump is a rotary piston Matsushita from an aircon, found at the scrapyard. I used Woodoc 20 thinned with turps 50/50, many vac cycles over a 4hr period and then dried overnite.
    vac chamber1.jpg

    Another view from the top, ss nuts to keep the wood submerged.
    vac chamber 2.jpg


    After about 2.5 hrs the foam had settled and now just a few small air bubble streams were left.
    slow down4.jpg

    Hows it vape you ask? The best Ive had since yesterday. :)

    Actually Ive designed it for 3A continous use with a 1.4 ohm atty, so Ive got lots of safety margin with the 10.5A battery.
    I've used a full battery charge with a 0.9 ohm coil in my mini PT3 to check and nothing got hotter than 35 degrees C, so Im happy with the end product.

    was taken from The Prophet by Kahlil Gibran
     
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    Last edited: 2/12/15
  2. hands

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    hands Some profound text goes here

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    it sounds like you had lots of fun with this mod.
    its a cutie and i hope there are plans for v2
     
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  3. BumbleBee

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    BumbleBee The Vape Guy ECIGSSA Donor Supporting Vendor VIP

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    Brilliant work @blujeenz, I love all the little details :clap:
     
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  4. kev mac

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    kev mac Old enough to know better ECIGSSA Donor

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    you did yourself proud.
     
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  5. Alex

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    Alex Reonaut Staff Member Administrator ECIGSSA Donor VIP

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    What an awesome post, thank you for sharing with us.
     
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  6. stevie g

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    stevie g Vaping Addict Supporting Vendor

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    Truly one of a kind.
     
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  7. blujeenz

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    blujeenz Loafing since 2013 ECIGSSA Donor

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    Thanks kindly for the uplifting words folks, much appreciated.

    @hands Im guessing you're familiar with the mod fever symptoms, this one was barely finished and I was thinking about a 555 PWM variable voltage model. :)
     
  8. Silver

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    Silver Flavour and throat hit seeker Staff Member Administrator ECIGSSA Donor VIP

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    Wow @blujeenz !
    That is amazing
    And i love it that it has a Ego adapter on top - perfect for the mighty Evod1 - lol
    Most of these diy boxes are for high powered vaping with coat hanger endowed atties. Nice to see yours for ego devices!l
    Great post and info - enjoy
     
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  9. Silver

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    Silver Flavour and throat hit seeker Staff Member Administrator ECIGSSA Donor VIP

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    Am just curious, @blujeenz - how many tankfuls of that mPT3 do you get on the little 18350 battery?
     
  10. Genosmate

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  11. blujeenz

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    blujeenz Loafing since 2013 ECIGSSA Donor

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    @Silver havent really done a mileage test but Im guessing just one. :)
    Its a pensioners rig, close to a charger and 2nd batt at the ready.

    Edit 14-12-2015
    I'm using 2 of the 18350 700mah batteries per tank with a 1R5 coil, using a 0R9 coil needs 3 batt charges per tank (1.5ml) on the mPT3.
     
    Last edited: 14/12/15
  12. Casper

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    Casper Experienced Vaper

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    Awesome!! Thanks for sharing. Tailor made for yourself!
     
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  13. Resistance

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    Resistance Vaping Addict

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    I saw this mod on Instructables.
    Awesome work @blujeenz have you done anything recently?
     
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  14. blujeenz

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    blujeenz Loafing since 2013 ECIGSSA Donor

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    Last thing back in 2016 was a denim micarta dual cell but I lost interest, too labour intensive.
    DM block.JPG
     
  15. Resistance

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    Resistance Vaping Addict

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    That should look awesome when polished or even a matt finish to compliment the denim look.
    Give it another go.
     
  16. Puff the Magic Dragon

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    Puff the Magic Dragon Grumpy Old Vaper

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    I see that you changed your icon @Resistance .

    How about this one ?


    upload_2019-1-12_11-34-8.png
     
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