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SpEeDy314 - there's only a few things that would cause auto-firing here. There is no 4.7K pull-down resistor across the on/off pin and ground, or it is a loose solder connection with the resistor and the pins. Double-check that you indeed soldered the resistor across the on/off pin and ground...

Yes, you need to de-solder and remove that connection block. It takes up way too much space.

I've found that there seems to be converter interference with amp and ohm readings if the meter's input/output is connected to any pin of the converter, so take the meter wiring off the pins of the OKR for the +510 and -Batt and wire as I show below and see if that solves the problem. The DPDT...

You can use the SUP75P03-07-E3 P-FET which is what I used before switching to the smaller dpak one. If space is at a premium in your mod and you need the smaller dpak sized P-FET, search for another one that has the same or similar specs as the IPD042P03L3G or SUP75P03-07-E3.

Tuxedo DNA40 with dual 18650 batts and reverse batt protection. 3D printed case using ABS. Went through 9 revisions some with shaving depth here and there. There's not an unch of space to spare it's packed lol. Second to last pic is size comparison with Hammond 1590A (92.5mm x 38.5mm x...

Mory Raptor 20A 120W with LCD meter (displays input volts, batt status indicator, output volts, ohms, amps). 3D printed C frame, sleeve, dual 18650 batt sled, and parts harnesses. The first one shown is woodFill from ColorFabb. The second one (not wired yet) is blue ABS frame, blue ABS dual...

Yes, this meter can be used in an unreg mod. Best not to exceed its 10A limit though, although I've read where some are pushing it past that with no issues and some are causing it to fail when pushing higher amps.

What that's telling you, Visus, is to calibrate the meter you will need to short the calibration button (i.e., press the switch if it's hooked to a switch) and apply 10V source, 1A load. I have a DC power supply so no biggie with 10V. I don't have a 10 ohm power resistor that will handle 10W...

All I can say about that friggin programming button, Visus, is don't mess with it. After playing around with it I somehow put it in PAS mode whatever that is, and now I've got a mucked up meter. After hours of trying to reset and trying this and that no-go - everything is off with accuracy -...

Lithium Li-ion battery tester LCD meter Voltage/Current/Capacity | eBay

Displays input voltage, output voltage, ohms, amps, and batt charge level. Just need to get it in a Raptor 20A mod now. woot! :laugh:

No, didn't do the acetone bath, Visus. Sandpaper - 180grit, 320grit, medium steel wool, then fine steel wool.

Height and width of the large screen display window I set to 25.4mm x 7.5mm. For my 3D printer the perfect sample had a side guide offset from center 0.86mm, top stop guide 0.92mm. I'll need to submit the samples to imat to see which offset and stop guide is perfect for their printer. It may...

Been tinkering with getting the DNA40 large screen centered - top, bottom, left, right, for the new mod I'm making. I did eight samples with eight different screen stops and eight different off-center screen guides. This large screen not only needs a guide stop for centering top and bottom, but...

No, not available for printing by others. Not sure if I'll do that, but am thinking about it.

No, plans are not public. I share a lot of stuff, but not my 3D CAD files lol. Here's the inside of the frame... the screen and up/down buttons are held in place with a screwed-in harness, the board's side rails are screwed into the posts adjacent to the screen guide. 510 and fire switch are...

Mera DNA40 with 26650 batt. 3D printed frame, sleeve, and batt holder. I did a re-design from the original design I did - moved the 510 to the back and recessed it and changed from a 12mm Mitec switch to a 16mm Mitec switch. I fought a losing battle with having an ABS sleeve - warped on the...

I'm an expert at it - I do it all the time. :laugh:

well that sucks, NaCl. No, haven't delved into fuses more than just these for unreg. mods. You have to be careful when you apply solder to this fuse though. I've read that too much heat during soldering and it fries the fuse and you may not know that until you need it to kick in and it doesn't.