Great review :+1:
I am also testing this light for a review, and I can confirm the greenish outer ring on the beam. But it is only very noticeable indoors and on clear walls. Not really disturbing when using the light outdoors.
Great review :+1:
I am also testing this light for a review, and I can confirm the greenish outer ring on the beam. But it is only very noticeable indoors and on clear walls. Not really disturbing when using the light outdoors.
Good teardown
Driver is primitive direct drive with PWM and without stabilisation
Do you mean the light gets dimmer as the battery voltage goes down?
nice review!
thanks
I have to do the exact same light, but you done an excellent job, maybe I should just send mine back
Added current measurements, but I’m sure they are not completely accurate.
Thank you for nice words, you just made me do another review (VG10S), will post it soon.
SF36: Non constant Current output
Great review, does the battery tube interchange between the sofirn and the thorefire?
without stabilisation
Do you mean the light gets dimmer as the battery voltage goes down?
Exactly. No constant output at all. FET, PWM 21 kHz.
Replace my sf36 then, I want constant output when voltage > 3.7 V
You SP-series have stabilisation when voltage > 3.7V, but SF-series (SF36, SF31)- NO.
Great review, does the battery tube interchange between the sofirn and the thorefire?
No, it doesn’t.
It’s very different design on the part conecting the head, you can see in my VG10S review.
Flashlight was provided from Thorfire for free as a replacement for bad VG10. Very similar with Sofirn SF36 I reviewed before so I will use some text from that review on identical things. [image] Specifications from manual: LED: Cree XP-L, 1100 Lumen, 13200cd (mine has same LED as Sofirn SF36 and it’s XP-L2 V6-2A-D, 5350-5700K) Operating voltage: 2.8-4.2V Battery: 1x 18650 Battery Switch: backward tail clicky Size: 13.4cm length, 2.6 / 3.3cm diameter, 133g (without battery) Material: 60…
Good review.
_8502 sot23-6 on board
You can safely use non-protected batteries. Protection already exists in the driver._
That’s good to know.
Good review.
8502 sot23-6 on board
You can safely use non-protected batteries. Protection already exists in the driver.
I got mine and checked it.
Unfortunately this does not work.
The flashlight starts flashing when the voltage drops below 2.7V
edit: power off after 2 min
Some of my photos in the album Светодиодные фонари и световые приборы. Всё о светотехнике. - Альбом MSS: Sofirn SF36
I need to double-check with my SF36 but I think the light turned off when testing with an unprotected battery.
When the LVP starts blinking you should change battery ASAP anyway.
EDIT
So I did :
at 2.78V the LVP blinking started, then after ~1min the light turned off.
But if I turn it on again, it will do another blinking cycle, then turn off after ~1min again. Etc, etc.
Maybe you got a faulty driver.
About 2.7 is turn off for mine too.
Can’t remember exact number but that’s close enough.
Has anyone compared the drivers for sale with the drivers in the flashlights?
I’d like to know which ones are used. They have three drivers for sale, identified with a flashlight model number:
(C8S, VG15/SF31, and C34)
I can’t tell which have low voltage protection, or whether any of those are constant current drivers (I don’t own any of those flashlights)
On the Fonarevka.ru, they tell me that it does not turn off immediately. It is necessary to wait some time, after it starts to flash. But I can check it only on Monday.
Has anyone compared the drivers for sale with the drivers in the flashlights?
At mine - usual direct drive. Without an inductor. From the laboratory power supply at 4.2V, the current on the LED is 4.6A (Hi mode)
The flashlight starts flashing when the voltage drops below 2.7V
and power off after 2 min :+1:
Has anyone compared the drivers for sale with the drivers in the flashlights?
I’d like to know which ones are used. They have three drivers for sale, identified with a flashlight model number:(C8S, VG15/SF31, and C34)
I can’t tell which have low voltage protection, or whether any of those are constant current drivers (I don’t own any of those flashlights)
What I see is none of that drivers from Aliexpress is not in SF36.