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  1. E

    Another DNA 20 Mod

    I would seriously consider the simple solution, it's just three switches in a handy, spring loaded format. EC111012010H - ALPS - ENCODER, SELF RETURN, 11MM | Farnell United Kingdom But if you must use the encoder solution, here is the circuit I used... You will need some way to program the...
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    Another DNA 20 Mod

    The button is indeed momentary :) Mouse wheel! Great idea, all the tricky mechanical stuff in one convenient package :toast:
  3. E

    Another DNA 20 Mod

    The little controller doesn't look quite so frightening when built on a proper board as a bonus it also fits :) I've written the software to keep the controller asleep for as much time as possible. A rotation wakes it up but to try to avoid accidental adjustment it ignores all movement...
  4. E

    Another DNA 20 Mod

    The little silver fire button is from one of my dead tube mods, it looks sweet. Add a short length of plastic tube and a nice Omron tactile switch and Bob's you uncle. Well, progress... Yes it looks messy and I think it's going to be a tight fit but it works :) The twiddly bit centre right...
  5. E

    Another DNA 20 Mod

    The charging board is in. Bottom left of the battery, that red wire with the insulation tape loops right over the top of it :) As for +/-, I may have something special up my sleeve...
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    Another DNA 20 Mod

    Just spent a day using the mod with the first test installation of all the bits. N.B. all wire routing and insulation is temporary at this time. Looking promising if I do say so myself. Now onto the +/- grrrrr
  7. E

    looking for a step by step guide on how to build a vv/vw mod

    I think the easy option is sticking a Kick on top of a battery. Cheap and not much to go wrong. Apart from that read everything by Mamu and bapgood. Then read it all again and all the great post you can find around here. Only tip I can give is start with something within, at least not too far...
  8. E

    Box mod questions

    ...and an AA is 14.5 X 50.5... How many other battery sizes are there? Here's a nice summary: List of battery sizes - Wikipedia, the free encyclopedia
  9. E

    Failed the Milo build

    The only chip test I can think of: connect a good battery through a fuse of some sort and see if the display lights up, test the up/down and fire buttons. That's it I'm afraid. Sparks from the battery end should not have damaged the DNA, though something else may have shorted too. The fuse in...
  10. E

    Another DNA 20 Mod

    The guy doing the anodising sent me a link via his facebook site to the finished case... ... https://www.facebook.com/Customanodising.co.uk They arrived here this morning and yes, he has done an absolutely wonderful job. The balls back in my court, I'll update with more pics and some...
  11. E

    First DNA20 design. Let me know what you think.

    @Gogg13s, I don't know much about uploaded images on this site myself, I do know there is size restriction. I load the images to my rented server and just link to them from here. For simple diagrams, you could try saving as .gif instead of a jpg, that can cut the file size down while allowing...
  12. E

    First DNA20 design. Let me know what you think.

    Sounds an interesting design and the outline looks great but the picture needs to be quite a bit bigger if the dimensions are to be legible.
  13. E

    Reverse Polarity Protection with the DNA20D

    Quick answer: If you have two 2920L300/15 in parallel and a short circuit current of 16A the current will split equally between them, 8A each is still above their trip current and the trip will take about 20 seconds - assuming the battery can continue to supply 16A for 20 seconds. If the...
  14. E

    Solder diameter

    Working with small holes, thin wires and small components, I use 0.4mm, it allows you to better see where the solder is going and control the amount of solder you're applying. It works fine for larger size electronics as well, though it never hurts to have some 1mm on hand. So, something around...
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    Another DNA 20 Mod

    Indeed. The higher actuating force also lessons the likelihood of accidental button pushes so a good solution all round. At the moment all options are open. Thank you. All questions are welcome. The 510 base is a Tank Airflow Controller , cheap, looks good, nice size and easy to solder to...
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    Another DNA 20 Mod

    Thank you for the kind words and great suggestions. My thoughts on the buttons so far: On the spine (display) side I think it will be too easy to push them by mistake? Front or rear face, a little ugly, especially as the buttons would have to be somewhere in the top 10mm. I did find these...
  17. E

    Another DNA 20 Mod

    Having had 2 out of 3 commercial VV units fail within 5 months of purchase I decided it was time to get hold of a hopefully more reliable DNA20 board and to make my own VW. A gripper design measuring about 64x80x25mm it's just big enough to include a micro USB charger, shown here with a sawn-off...
  18. E

    Reverse Polarity Protection with the DNA20D

    The arrangement on the left will block all current flow if the battery is connected incorrectly, when the battery is connected correctly the diode will pass current but will also cause a voltage drop unfortunately, which is why Mamu investigated fets. The arrangement on the right has a number...
  19. E

    Kanger ProTank II keeps flooding for some reason...

    @OP, How tight is 'nice and tight' ? Just twist with a light to medium finger grip and when it slips it's probably tight enough.
  20. E

    top vs. bottom wick

    I migrated from Nova Vision to CE5, both top coils, and the latter proved to be a solid and reliable device. When one of my CE5s cracked along the bottom I went looking for a replacement, hearing good things about the bottom coil Evod I thought I'd give one a go. After 3 months of trouble free...
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