[Review] 77 Outdoors D25 Headlamp (18650)

Quadrupel · 2021-11-03T21:07:55.000Z

“The manufacturer is ”Aheitong” “:https://detail.1688.com/offer/646068512239.html?spm=a261y.7663282.hotsale.5.5c3855e6XDjFmg All other like Sofirn or Boruit or… are resellers only.

Ma3oska · 2021-11-04T11:36:37.000Z

Thank you for informations Quadrupel.

Can you tell me, if it is possible to open front part with reflectors and change LEDs? I dont see any screws?

Quadrupel · 2021-11-04T11:41:29.000Z

Dont know, but probably glued.

Agro · 2021-11-04T12:15:01.000Z

Ma3oska:

Thank you for informations Quadrupel.

Can you tell me, if it is possible to open front part with reflectors and change LEDs? I dont see any screws?

Depends, they probably changed the process over time. Most people were successful with opening D25-family lights, but some reported that they couldn’t open theirs.

Ma3oska · 2021-11-04T14:06:33.000Z

Yeah, I think so too.

D25 have user friendly design.
I have early version of D25 from start of production, where MCPCB with LEDs is pressed to the hole in body headlamp and there is no mass under it.
Second version of D25 from 12/2020- BORUIT have flat surface under MCPCB with good thermal path.

I was curious, what type of design have this headlamp and if it is possible to swap LEDs and make some “Nichia flooder” from it.

Quadrupel · 2021-11-04T14:36:56.000Z

Just get D10 and few various angle 20mm TIR optics.

blueb8llz · 2021-11-04T18:15:01.000Z

Ma3oska:

More LEDs - more Adidas

Page Not Found - Aliexpress.com

https://www.youtube.com/watch?v=OXK8uu59zKg

Thanks. Pretty decent upgrade to my d25s. But I wonder how much brighter this 5 led version is. It’s says 3000 lumens. Not sure about that.

Jan910 · 2022-01-25T20:47:04.000Z

hi, someone tried to insert the driver from the lumintop fw3a?

Verodin · 2022-04-06T07:20:41.000Z

gchart:

Tom E:

Wow, nice mod! … How did you get access to the driver?

Thanks Tom! And kudos on RampingIOS, I like this headlamp 10x now. I really would like some different emitters, but my only spare XM-L2’s are cool white. I’m kinda waiting to see if anyone gets the 4000K or 5000K SST-40’s in. Those are about the only other 3V 5050 LEDs I can think of unless (outside of those crazy 3V 50.2’s). But I really don’t want to dump a bunch of money in a cheap headlamp.

Unscrew the end cap with the 2 notches CCW. It’s probably just tight. Mine had no hint of glue anywhere. There is an o-ring though that might be contributing to the resistance.

Desolder the LED wires

Using a wooden stick or something, push on the PCBs from the battery tube area

BTW, I’ve seen tear-downs of the single emitter version too. Same/similar driver. But the LED was mounted on our typical 20mm star, makings emitter swaps simple… and optics and option (link). The simplicity of this driver kinda bugs me, though. It’s just a few current limiting resistors being PWM’ed.

Tried to open a D25LR, same host. But geez it’s impossible, even almost broke my tool. Turned CCW and it maybe moved a little judging by the few creaking noises, but nothing else. Completely stuck :person_facepalming:

Quadrupel · 2022-04-06T15:45:56.000Z

To open you have to turn clockwise.

Verodin · 2022-04-06T16:18:53.000Z

So I’ve been tightening it instead…oh crap. I went medieval on the thing CW until a piece of aluminium went flying. I’m throwing in the towel… you can’t win all battles. Maybe I’ll get another one. I really want to get to the driver and turn it into a dual tint headlamp. Anyone got a photo of the D25LR driver lying around?

Quadrupel · 2022-04-06T16:46:31.000Z

Heat it.

Verodin · 2022-04-06T17:33:55.000Z

Maybe I’ll make 1 last attempt (it’s in front of the fireplace right now warming up). Currently debating in my head how far I want to ‘destroy’ it. I like this light and right now it’s still usable. Worst case I’d have to shell out 25 USD or so to get a new one. So not the end of the world, but still a waste.

Verodin · 2022-04-06T18:45:34.000Z

Success, but by cheating… I ‘borrowed’ my son’s and that went relatively easy. He’s not using it anyway, so I only feel mildly bad about it The damaged one is not moving at all, I probably ruined the threads beyond saving.

As expected slightly different from the other ones posted before. Chip is completely unmarked and lots of unpopulated components. Doesn’t look too promising, but we’ll see.

Edit:
Traced it and it’s really straightforward. From MCU directly to transistors(?). Then Q2 goes to led wire 1 and Q3 goes to wire 2. That’s all she wrote….

So the limiting resistors are located on the MCPCB in this model. The ~~680~~ 0,68 ohm resistors (0,23 ohm total) go to the anode of the normal 3V led, while the 1,2 ohm ones (0,4 ohm total) go to cathode of the SST20 DR. Not sure if just replacing the 1,2 ohm ones would do the trick, but it does look like it.

Quadrupel · 2022-04-06T18:58:59.000Z

Simplest 2 channel and mosfet pwm driver. First solder new led and see whats the output, and latter change R values to get desired output

Verodin · 2022-04-06T18:56:26.000Z

Well, this is the simplest driver I’ve ever seen. But really easy to mod since you don’t need to get to the driver at all. Access to the mcpcb is enough. Measured their size with a caliper and the closest match is 3225 resistors in case anyone wants to know. Can’t be too difficult to source.

Quadrupel · 2022-04-06T19:01:36.000Z

Tint shifting is quit useless, better change optics 1 for throw another for flood

Verodin · 2022-04-06T19:06:37.000Z

My use case would be camping. 4000+K for when you need normal light, e.g. for setting up the tent and 2700K reading a book before bedtime or go outside at night to pee.

drazz · 2022-08-18T02:10:00.000Z

My D25 stopped charging through USB. Any guide as to how to remove the MCU so I can fix it?

drazz · 2022-08-18T02:12:45.000Z

Verodin:

So I’ve been tightening it instead…oh crap. I went medieval on the thing CW until a piece of aluminium went flying. I’m throwing in the towel… you can’t win all battles. Maybe I’ll get another one. I really want to get to the driver and turn it into a dual tint headlamp. Anyone got a photo of the D25LR driver lying around?

haha damn mines the same, i was scared it was gonna end up being clockwise Damn!