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  1. J

    ..and my "Eraser"

    Hy I want to present my newest mod VV "The Eraser" :).Works with 2x16340, step down regulator, charger built in and sensitive switch with mosfet.
  2. J

    Question for the experts??

    i tested like that but with 18650 li-ion. atty will draw current from battery pack and from charger. If charger have a maximum current set it`s ok .i think it works
  3. J

    Need mod help bad!!!

    it`s no good. work`s but you don`t have a fine adjustment of volts, it`s posibile to have a large steps.You may try to see what happens.
  4. J

    buck/boost circuit with LTC3113, 1.8V-5.5V max 3A ~96% effectivity

    from my experience step- down regulator is easy to calibrate, for step-up is hard, however like he said @CraigHB, if you test, and calibrate wright value,work fine. Very important is Cout, inductor, and Mosfet.
  5. J

    Passthrough Idea

    why you don`t use some battery charger IC, find a lot to buy from farnell.com or mouser. That IC work`s like a current regulator. Connecting directly to USB or 5V power supply, you short the life for battery. exemple: http://www.alldatasheet.com/datasheet-pdf/pdf/269780/LINER/LTC4052-4.2.html
  6. J

    My newest mod box VV

    Because the new announcement, say: I don`t make this modd in commercial scope, it`s only for me, hobby stuff :D.Post here is to share information with entire world :). It`s a good "database" for new modders this forum. Anyway i don`t have enough time to produce a lot of modd`s:)
  7. J

    My newest mod box VV

    or :D
  8. J

    buck/boost circuit with LTC3113, 1.8V-5.5V max 3A ~96% effectivity

    :D all i can do for you is :
  9. J

    My newest mod box VV

    it`s made by datasheet schematic, Cout = 300 uF tantalum. all as you need is here LTC3872 datasheet pdf datenblatt - Linear Technology - No RSENSE Current Mode Boost DC/DC Controller ::: ALLDATASHEET ::: also other modification is FB resistor (resistor divider) 1K to GND and 10 K trimer
  10. J

    buck/boost circuit with LTC3113, 1.8V-5.5V max 3A ~96% effectivity

    i use 1 batt 18650 2000mah.work good with atty 2 ohmi or higher.PCB was made by me, i use a mosfet with gatethresold 1 -3V.
  11. J

    buck/boost circuit with LTC3113, 1.8V-5.5V max 3A ~96% effectivity

    ltc3872 i use and is good.you may try some free sample and test :)
  12. J

    My newest mod box VV

    i don`t understand what you want to say :) .My test was made on 1.25, 2 ohmi, 4 ohmi atty..Voltage out have a low drop out around 0.1V - 0.3V depends of atty.At boost convertor is very important inductors value and Cout value for minimal drop out voltage. With 1.25 1.5 ohmi atty work in liniar...
  13. J

    LM2577 Fail

    you are wright :D. Step-up module is good only ptn04050C and you have two options : buy ptn04050C from TI or build a boost convertor with IC :D.Or make a step down with 2 battery
  14. J

    My newest mod box VV

    anyway i modified some values from datasheet schematics ;) to work well
  15. J

    My newest mod box VV

    I use TSOT-23 package.It`s ok for me :D
  16. J

    My newest mod box VV

    i made order of free sample from linear technology. I tested some other IC like lt1170 or LT1370 with Mos Fet integrated but not satisfied of this.And after i try some other, and this is ok. At 2 ohmi atty i have only 0.2V drop and at 4 ohmi HV5 ai have 0.1V drop down. 2 ohmi ---3.6V out and...
  17. J

    My newest mod box VV

    yep This tube have a boost convertor made with other IC, work with 1 x 18650 battery. LTC3872 from linear technology a very good IC for boost.
  18. J

    LM2577 Fail

    try to find some step-up convert with lowest Vin, about 2.5V minimum to Vin.
  19. J

    My newest mod box VV

    and tube. It`s VV with step-up convertor.Works from 3.3V to 10V :D
  20. J

    LM2577 Fail

    lm2596 work fine,i made mod with this IC.Anyway lm2596 it`s a step down regulator need 8.4V In (2 series Li-Ion) and lm2577 it`a a step up regulator works with 1 li-ion, but it`s no good for ecigarette. A step-up convertor not work well with 1.25 or 1.5 ohmi atty, it`s need to use 2 ohmi and higher.
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