Mike n Tibs DNA Mods!

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SlickWilly

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Morning everyone, hope everyone had a great weekend. Didn't get much time to spend on my build over the weekend, hopefully I can get it done or close today. Only thing I got done was solving the issue I had with the short screws I used to mount the board, I solved that last night and this works very well for anyone looking to mount these 200 boards in a bare Hammond style box without having to use some additional face plate or fixture. This also grounds the board to the mod via the mount pads, it also helps transfer heat from the board to the mod which was said to be not critical, but a benefit over on the Evolv forum. I'm not going to rely on grounding the board this way, all neg/ground wires will be soldered to the board and attached to the case via the 510 ground ring.

As seen in the pics below I had used self tapping screws going through the face of the mod into the board, I was going to make stand off tubes with nuts and screws like VapingBad did with his 1590A mod >>here<<. Instead I made some stand off tubes from square aluminum tubing that I picked up at the RC hobby shop, this tube made by K&S [HASHTAG]#83010[/HASHTAG]
Square Tubing - K & S Precision Metals: Full Line Metal Specialists
Square Aluminum Tube 3/32x3/32 (7) (k+s3010) K-S Hobby and Craft Metal Tubing

I used the same screws I used as before just shorter, they thread nicely into the tubing. Now I have three screws going through the back side of the board into the tubing and three more going from the face of the mod into the tubing. First I mounted the stand offs to the board, then attached the board to the mod. I made the tubes .195 long, this sets the board so the usb port is coming into the port opening in the face of the mod but now just slightly below the surface, you can see in the pics how it stuck out before. The screws I'm using came from old hard drives I stripped down and salvaged the magnets from, the screws held the little pc boards of the HD's and are in varying length, all measure .065 or 1.65mm diameter.

After I had the board setting deeper and to the correct depth, the buttons I made were then loose, I just put small o-rings over the buttons before placing them in the mod which gave me the same perfect fit as before, they are ever so slightly pre-loading the on board switches so there is no rattle and they have the same short throw of the switch themselves, (I hate rattling mods). I still have to shorten the buttons just a tad, they still stick out from the face of the box a little more then my liking, not a big deal and I'll take care of that once I get to the fine tuning stage, I'm still in mock up mode. I'll get some detailed pics of these stand offs posted later.

DSC01769_zpsn7o3qoi9.jpg


DSC01768_zpswd2v8ygj.jpg
 

VapingBad

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A couple of weeks ago on the CoOp thread we were talking about the balance current, I can see my one drawing 10 mA for the last 10-15 mins, I guess that is balancing 1 cell. It's the first time I have seen it do this and it's a pity I have it on a plug top charger not the PC or could check which cell or cells in eScribe. Nothing to worry about just posting to share the information.

ETA I may be wrong, jut looked again and the battery bar wasn't showing the charging graphic, not sure if that was the case before not that it matters much.

ETA Escribe shows all 3 cells balanced at 4.09 V, but it is continuing to charge at 490 mA and now at 4.10 V per cell so it looks like in device monitor the Max Battery Life setting is ignored. Now dropped to 300, 200, 100 mA, still 4.10 V per cell so I was wrong. Charging graphic is on the screen until < 100 mA, but it is still drawing 80 mA so finishing up charging. Ok, so when it gets to idle it is drawing 5 mA in Escribe, 0.00 A on the screen on the DNA, no charging graphic, but is showing the charging fields and stays like that until unplugged. Again nothing worry just sharing the info.
 
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TruckerMSA

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Tpat591

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looks good! I would would make a small cutout in the 510 chamber for wires going from the board to the 510 conector.
Figured I got a drill & can use it as necessary. I'm really just killing time until Shapeways ships my top ring panels and board mounts for the aluminum enclosure I started with.
 

TruckerMSA

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Figured I got a drill & can use it as necessary. I'm really just killing time until Shapeways ships my top ring panels and board mounts for the aluminum enclosure I started with.

true, but you could incorporate it in the design that would eliminate any mistakes someone might incur if they had it printed out and they had to drill a hole.
 

Tpat591

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true, but you could incorporate it in the design that would eliminate any mistakes someone might incur if they had it printed out and they had to drill a hole.
As I said before it is not my design but an adaptation of BRD's design I took the liberty to modify. I was worried about overstepping doing even that. I was more concerned about offering him ideas he could incorporate and adapt his design into than doing it myself as I lack the skill to have others rely on my CAD skills to produce a mod they can rely on. I only started using Tinkercad a short while ago and have no confidence in my abilities. That STL was a way of me sending that design to BRD more than anything else.

Depending on ones battery, connectors or methods I would rather they cut a hole that suits their needs TBH.
 
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KTMRider

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Just ordered a few.
I was just about to but I got a package from John at Evolv and it's a full DNA200 set (board, display and balance port) today. I mentioned there was a chip that got knocked off that was showing cell 1 at 2v all the time and he suggested trying to solder it if I could. That sucker is small. I also mentioned my dud 500ma charging board. I thought he was just sending me a replacement 500ma charging board :lol:

A couple of weeks ago on the CoOp thread we were talking about the balance current, I can see my one drawing 10 mA for the last 10-15 mins, I guess that is balancing 1 cell. It's the first time I have seen it do this and it's a pity I have it on a plug top charger not the PC or could check which cell or cells in eScribe. Nothing to worry about just posting to share the information.

ETA I may be wrong, jut looked again and the battery bar wasn't showing the charging graphic, not sure if that was the case before not that it matters much.

ETA Escribe shows all 3 cells balanced at 4.09 V, but it is continuing to charge at 490 mA and now at 4.10 V per cell so it looks like in device monitor the Max Battery Life setting is ignored. Now dropped to 300, 200, 100 mA, still 4.10 V per cell so I was wrong. Charging graphic is on the screen until < 100 mA, but it is still drawing 80 mA so finishing up charging. Ok, so when it gets to idle it is drawing 5 mA in Escribe, 0.00 A on the screen on the DNA, no charging graphic, but is showing the charging fields and stays like that until unplugged. Again nothing worry just sharing the info.
I've been charging from a PowerBot 5 port USB charger. It's pulling .94a-.98a and takes about 3 hrs to fully charge my 1300mah (from about 20%).

I got my tracking # for my Hana v200 this morning :D
 

BlueridgeDog

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Cotay

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Since I have been sick the past four days, I decided to put my down time to good use. Here are the fruits of my weekend labor. From left to right: DNA25 (1200mAh LiPo), DNA40 large screen (single 18650); DNA40 small screen (single 18650); DNA200 (Hyperion G6 900mAh). The DNA40 small screen uses a jonniemac faceplate that I'd ordered awhile ago, but the box design is my own (with magnetic rear door). The DNA40 large screen is all stainless steel (I was going to Cerakote this, but ocdmods wasn't able to quote me despite several email communications with Darren. I understand that Darren has been ill, so not a big deal...I just wanted to build it finally! I might eventually take it down and coat it, but for the time being it's great...and very heavy (326g with battery installed). The DNA200 is absolutely perfect...even my wife loves the form factor and weight (155g with battery).

20150727_133651.jpg
 

Tpat591

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Let's see it it works as a bottom feeder then we can decide if there is any low-hanging fruit as to multipurpose layouts. It seems rather large to most folks I show it to, though I have bear hands.
Understood. I can always try to properly modify & print on my own should I need to. We'll need a Round 8 by the time I am ready to move forward with any of these designs anyway.
 

awsum140

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I got some major progress on my low mount DNA40. The top cap is complete, fits properly and mounts nicely to the extrusion. The cutout for the tank really leaves little room on the sides, but once it's mounted it seems strong enough to actually provide decent protection to the tank. It's actually looking like a real mod!

I do still need to use a plumbers roll to round out the top edges better, but even with a quick treatment with a flop wheel it looks fairly decent. I'm stuck waiting for some taps, screws and tactile switches. Due to the extrusion I'll be using outboard switches for all functions, I think. It may be possible to use the onboard fire switch though, depending on my machining abilities.

Next trick is the bottom plate with a hinged door for the battery.
 
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