Sofirn SC31 PRO, New Anduril Flashlight

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Lux-Perpetua
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Yeah, names can be difficult sometimes. Big Smile I once also thought Jackie is a male name only. But here‘s a good example of a popular female person with that name...

 

Tom E
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TheIntruder wrote:
Tom E wrote:
  • like the black SS clip over the SS color!
  • like they shortened the length in the head, probably from shortening the reflector
  • not a fan of the new tailcap with the sharp edged lanyard hole - it's extra length just about evens out the shortening of the front bezel

The tailcap isn't actually new. It's a recycling of the tailcap from the SP32 series, and (obviously, now) interchangeable with the SP31 models. I believe the shorter head of the Pro, combined with the SC31/B's tailcap, or the new magnetic version, make for the most compact configuration of the their 18650 tube lights. I really like my SP32Av2s (XP-L2 beam aside), but I guess they think the SP31 is their direction going forward, by giving it a more balanced beam and the other new features. I like the black clip as well. Hopefully at some point, Sofirn will make them available for sale as parts. I'd grab a couple at the same time as the magnetic cap for my B.

Yep, I should know - I have a SP32 Facepalm - think it's the original version, pics from June 2017. I gave up on the SP32 since it had a switch mount on a vertical board, making it very difficult to mod with a FET+1 driver. Here's some pics from them, probably posted elsewhere long ago, also showing the sharpness of the lanyard hole trim:

The tailcap does look unchanged, didn't try to LEGO yet.

Always thought it odd Sofirn was selling a SP32A V2 host here, and sold 9 of them, when the driver replacement is so difficult. Only other explanation is for replacing an original host. It has 1 5 star review as well, but in Russian.

When the SC31(B) came out, sure looked like a standard side switch PCB light:

Which led to this:

Scimmy
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Just ordered my Pro from Sofirn along with the 350 battery tube. I have the 31B but I’m looking forward to fiddling with Anduril Smile

Nooner
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@ Tom E.

Can you comment on how you removed the stock driver?

Tom E
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Nooner wrote:
@ Tom E. Can you comment on how you removed the stock driver?

Sure. Driver is glued down, plus it has a vertical board centered for mounting of the USB connector. From what I recall and what I typically do is desolder the LED wires from the MCPCB, then use a solder pick tool to push thru the wire hole, applying pressure. If pressure alone doesn't work, I'll give it a few taps of the hammer - lightly at first, trying the minimum amt of force that it takes to break the glue seal. For this SC31B, the vertical board broke off from the hammering (most likely). You can see the white glue (or silicon) on the bottom and a little on the top.

I've removed many glued drivers using this method. With the solder pick, usually you can salvage the stock driver with minimum damage, sometimes a surface mount gets damaged bad - usually you can "feel" if the solder pick is on an IC or not.

I suspect the Pro driver is glued down as well. The brass ring around the driver on the spring side doesn't look threaded down to me - I've seen these thin brass rings used before to protect the driver from wear and tear and to make good contact with the tube. I've even desoldered those rings and re-used them on a driver replacement. For my modded SC31B, I did not glue the BLF driver - the tube threads down to hold it in place. This works for me -- don't like glue.

These are the glued driver removal tools, EDC18 driver shown:

Nooner
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Been using the light in 18350 configuration with the Convoy S2+ clip.
It registers well on the smaller groove of the tube.
I’m pretty happy with it.



Also for everyone info. With the magnetic tailcap installed it’s a frog’s hair shorter than an S2+ with 18350 tube.

Nooner
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Thank you for the detailed response Tom E!
I was thinking about doing something like that. But I definitely expected some damage would happen. But this is good information.

Tom E
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That's nice with the 18350 tube! Is that tube for the Pro specifically? If not, where from?

Found pics of the extra soldered on brass ring from an Amutorch AX4:

And transferred:

 

Nooner
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18350 tube is the included tube with the SP40 headlamp. Also sold separately by Sofirn.

jp9mm
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Tom E wrote:

That’s nice with the 18350 tube! Is that tube for the Pro specifically? If not, where from?

The standard 18350 tube from sp40 works, I’m the only one who reported it barely fits so far Wink

Nooner
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Mine is definitely tight. Tighter than it should be probably. But ultimately it does fit.

Tom E
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Hhmm, think I got a SP40, gotta check!

Lux-Perpetua
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Mine fits perfectly as shown in my post #101.

Zappaman
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My SP40 short tube’s threads fit like clockwork. But as mentioned, the springs on both ends are compressed about as “tight” as any light I’ve cranked down. If you were going to keep it an 18350 shorty it’s whole life I think it would work fine though. But the springs might get pretty flat after a while Big Smile

ZappaMan

GBE
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Does the SC31 PRO have a FET + 1 driver?

Vamko
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Can somebody test if battery check and charging functions work correctly?

Battery check of my SC31 Pro shows 4.5V and still charging the 35E cell…

Lux-Perpetua
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Mine indicated 4.2V whereas the battery’s actual resting voltage was 4.05V. It would be nice if Andúril had some feature to calibrate the voltage measurement.

 

Some beamshots I took yesterday night. The white house is about 120m far away.

 

Sofirn SC31 Pro (Luminus SST40 6.500K 70CRI) 2.000lm

Wurkkos FC11 (Samsung LH351D 5.000K 90CRI) 1.300lm

Vamko
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Thanks Lux-Perpetua! Probably it is Ok that the battery check indicates higher charge than the actual one. Hopefully the built-in charger does not overcharge the cell.

Lux-Perpetua
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Can you please try to immediately measure the battery‘s resting voltage with a(nother) voltmeter? If it’s really overcharged way above 4.25V it seems to be a severe problem that deserves further investigation. Thanks for letting us know about it.

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Vamko wrote:
Hopefully the built-in charger does not overcharge the cell.

The charger is a separate circuit and should be fine.
Tom E
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Btw, I added voltage cal to Anduril, but only to the 2019 version. TK changed the voltage reading quite a bit since, so it would take a little time to port. After years of frustratingly voltage cal'ing each individual mod light for Narsil, finally built it in to Anduril.

I got Anduril working like Narsil: 3C to voltage, 2C next to temp, 2C next to version #. When you are in voltage reaging mode, 4 clicks to calibration.

Vamko
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The problem is that I don’t have a voltmeter Smile Need to get one. Therefore I am asking if someone else tested this.
I have a LiitoKala Lii-100 charger, and it is also still charging the cell, indicating that it is not yet fully charged. So most probably it is fine.

Lux-Perpetua
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SammysHP wrote:
Vamko wrote:
Hopefully the built-in charger does not overcharge the cell.
The charger is a separate circuit and should be fine.

Right, anyway an offset of 0.3V is substantial and renders the voltage check feature useless. I wonder what technical issues cause such discrepancies. I suppose this is not a Sofirn-specific problem but more likely a correlation between a certain driver component and Andúril.

Lux-Perpetua
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Tom E wrote:

Btw, I added voltage cal to Anduril, but only to the 2019 version. TK changed the voltage reading quite a bit since, so it would take a little time to port. After years of frustratingly voltage cal'ing each individual mod light for Narsil, finally built it in to Anduril.

I got Anduril working like Narsil: 3C to voltage, 2C next to temp, 2C next to version #. When you are in voltage reaging mode, 4 clicks to calibration.

Maybe this could be a worthwhile feature to incorporate into Andúril 2.0? I talked to Sofirn about the importance of an accurate thermal calibration today. As it’s probably a PITA for any manufacturer to do the factory calibration for each single flashlight, it will need to be highlighted much more in a „Getting Started“ section of the manual. Adding a voltage calibration would fit into this section seemlessly.

Tom E
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GBE wrote:
Does the SC31 PRO have a FET + 1 driver?

Did some research on this. Best as I can tell without pulling the driver, it's a FET+1, based on:

  • no 7135's on the underside of the driver
  • if there was a bank of 7135's, they would have to put them on the vertical board where the USB charging is - doubt there's enough space
  • I can clearly see a slight flicker at about 0.35 amps, coinciding with the 7135. Ramping up to the default ramp top of 3.85 amps, I can't see any other flicker in that range, and if 3.85 amps was the top of the bank, there would have to be 11 7135's in the bank - very much doubt enough space.

Btw, the bezel is glued with blue stuff, probably Loctite. I got it open with sticky blue gloves, but was a little tough, not too bad.

Using a very good VTC5D cell, with the SST-40 6500K: 7.9 amps at the tail, 2240 lumens at start, 2070 lumens at 15 secs, 19 kcd (276 meters). The springs don't look like anything special - bypasses would probably get a bump.

I'll probably at least attempt to remove and get a good look at the driver.

jp9mm
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Lux-Perpetua wrote:

SammysHP wrote:
Vamko wrote:
Hopefully the built-in charger does not overcharge the cell.
The charger is a separate circuit and should be fine.

Right, anyway an offset of 0.3V is substantial and renders the voltage check feature useless. I wonder what technical issues cause such discrepancies. I suppose this is not a Sofirn-specific problem but more likely a correlation between a certain driver component and Andúril.

Noticed some odd readings from mine as well. 4.3 when its 4.14 (right after charging)
One time it blinked out 3.3 first then 3.8(actual), even the temp check will go up a couple c after first check.

Nooner
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Checked charging voltage on mine.

Charge terminated at 4.2 blinks indicated by the light.
Digital multimeter showed 4.14 volts.

Lux-Perpetua
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I checked the voltage offset on mine once again. After charging the Sofirn battery in my Nitecore UMS-2 it has a resting voltage of 4.16V. Once inserted into the SC31 Pro it blinked out 4.3V. That’s an offset of at least 0.14V (potentially up to 0.23V).

On TLF some people noticed sharp edges on the heat fins as well as a foggy glas lens. I can confirm both on my sample, too. However, it is not as severe as on some previous models in the past (SC31B, SP33 V2).

Tom E
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I can confirm the Pro is FET+1. It follows the design of the SP36, as they claim they are running the same exact Anduril version as for the SP36.

I pulled the driver. Weak glue holds it in place. 4 wires to the side switch. Used a solder pick to push down on the driver thru the LED+ wire hole, no hammering, just pressure - didn't damage anything. The driver has Chinese lettering on it, based on the SP36 design.

Think mine reads voltage high as well. Sounds like all the differences reported read high.

pennzy
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The charger in the SC31B that I gave away was a little weird too. The light turned green at about 4.something but it continued charging for what seemed like forever. Finally it stopped charging(I was watching it on a USB tester) at about 4.17 volts. It didn’t overcharge but it also didn’t stop when the light turned green either.

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