John

Can you save your settings file and post it here? There are a number of screen settings, and one blanks the screen out when you are firing. If you post the .ecig file of your settings (you'll have to zip it) we can see what combination of things is causing this.

How long have you had this one running, out of curiosity? 23F/A seems okay, but running 46 degrees above ambient when idle is way too hot.

cs@opusvapor.com

Well, the basic issue is that it is running significantly too hot. The question is is it always running hot, or is it just during charging. Case analyzer should be interesting.

Well, the quick fix would be to find the short and then replace the fuse, but as this is the third Opus to do it now, I'd send it back to Roger and have him fix the clearance issue and put a new fuse in it for you.

If you open the battery compartment? Really? It is one screw and clearly designed to slide on and off.

Did the problem start when you updated the firmware perhaps? What firmware version are you running?

Case analyzer takes six hours to run, and you need to start with a fairly discharged battery...

If you open up the battery compartment, is your fuse intact? The first generation opus boxes don't have much (any) clearance between the case standoffs and the fire button, which is as near as I can tell yet what's popping fuses on opuses (and, knock on wood, only opuses so far) Only turns on with USB, won't charge and a multimeter shows normal battery voltage would be the signs of a popped fuse. Or post a picture of the fuse and I'll be able to tell you for sure.

Are you guys looking for specifically our reference case button caps (machined square, chamfered, engraved stainless steel, expensive to produce) or any workable button caps?

How do you have the DNA 200 secured to the project box? Also, have you run case analyzer on your build? The results of that would be quite interesting here.

Hrm, yeah that doesn't seem like it should be getting that warm unless the board is totally bedded in hot glue or something on the other side. The temperature sensor is down by the USB port, does that part of the board get perceptibly warm? We have some margin on the charger, so we could push the limit up a bit without it causing a problem.

You can use a screen from the large screen DNA 40 if you have one going spare.

If you mean the via hole next to the output pad, then no, we use that to be able to test the output from the top side during production. It connects to the pad, so you can solder it or not, it doesn't make a difference.

If the board temperature is over 130 degrees F or the air temperature is over 113 degrees it will throttle the charge current to 100 milliamps. Is this a 3d printed or plastic case by any chance?

Which is what it should. The question is when it is continuing to fire after you stop pressing the fire button, does it read 9-12v, or does it read less than a volt? That would tell us if it is a hardware problem or a software problem.

When it is sticking, if you measure the voltage on the offboard switch holes closest to the output edge, does it read something like battery voltage, or does it read less (.5 volts or less)? Measuring relative to ground (any of the mount pads)

That's still a pretty significant mismatch. If you let it sit on charge for a few hours, does it get fully balanced?

You can load and use segments arbitrarily small with .csv and it will work... but the smaller your TCR the worse your temperature accuracy, obviously. We'll change the minimum to .001 in the next iteration of EScribe to accommodate. The initial resistance doesn't really enter into it unless you're doing something silly low, like a .02 ohm SS coil. With a low ohm coil you get more quantization and offset errors in the voltage sensing, but less with the current, so it more or less cancels out in the .05 to 1 ohm range.

That sure looks normal. It would be nice to see the board face on so we can see the mounting holes for the external switches. If those are being bridged by a piece of debris or are covered in e-liquid that could cause spurious firing. Also, what firmware revision are you running? Does going forwards or backwards with the firmware revision make the problem stop? (i.e. is it specific to a certain firmware or is it specific to this board?) If you have a multimeter, what voltage do you get between the external fire button connection holes when the device is staying activated, but you are not pressing the button. Does it stop firing after the 20 second timeout? Is it just the fire button sticking, or have you seen the adjust buttons do the same? Thanks John

Great stuff! If you have a fairly large power resistor bank running to an atty (I use 4 1 ohm 50 watt power resistors in parallel) the battery analyzer feature in Escribe will give you the exact capacity of any pack at any discharge power. Takes an hour or two to generate the curve, but you don't have to do anything but set it up and wait. It would be interesting to add the capacities and curves to this document if people test various batteries. Also, I can confirm that our beta mod batteries are the FullyMax ones. Ours are slightly different from the standard version, in that we had them route the tap and power connections out the same side, but it is otherwise the same battery pack.

Can you post a picture of how you have the board installed? Especially the connections for external buttons? Thanks! We'll get to the bottom of it. It isn't likely to be software, because software doesn't change after a couple days.

They are common, but remember the board itself needs a ground connection too.

9. (70,1) is a point. "Metric" has no mathematical meaning in your sentence. You're a sweet guy, but you are in my sandbox here. I'd be a lot more appreciative if you'd use everyday words and concepts in a technically correct manner, and as clearly as possible. If you can create and publish correct, repeatable TCR curves for the wire you sell that would be beneficial to both of us, but my patience for bamboozling is low and getting lower.

LiFePo4 has very, very little capacity difference between 3.36 and 3.6. Are they closer to each other when running?