YEZL Y3 CNQUALITYGOODS Group buy. 3 Versions. See post 274 for delivery details.

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dangerous
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I got mine, these are my initial impressions:

The head and body have multiple scratches that did not happen in transit.
I got three 18650 spacers since I got the C version – one spacer is much better than the other 2 as the 18650s rattle in the other 2.
Both lenses are reflective, but they are clearly different – I don’t know which one is the AR…
Unprotected 26650 rattle in all configurations.
I don’t like the ui with 2 switches where you have to turn it on/off with the tail switch and switch modes with the side switch.

BLF

led4power
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Fake tracking numbers,no explanation why china post didn't want to ship lights(???) ,all received lights are defective/factory rejects? Ric-CN,can you explain that?

Gj
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dangerous wrote:
I don't like the ui with 2 switches where you have to turn it on/off with the tail switch and switch modes with the side switch.

So why did you buy it? The UI was well documented beforehand.

wight
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dangerous wrote:
I got mine, these are my initial impressions:

The head and body have multiple scratches that did not happen in transit.
I got three 18650 spacers since I got the C version – one spacer is much better than the other 2 as the 18650s rattle in the other 2.
Both lenses are reflective, but they are clearly different – I don’t know which one is the AR…
Unprotected 26650 rattle in all configurations.
I don’t like the ui with 2 switches where you have to turn it on/off with the tail switch and switch modes with the side switch.

One of my extensions has a mistake on the knurling. I’m not complaining, I don’t think that this is a problem for me. OTOH I wanted to mention this openly in case it’s useful information for anyone who was more unsatisfied than I am (such as you or downlinx), as general information about problems w/ this GB.

led4power wrote:

Fake tracking numbers,no explanation why china post didn’t want to ship lights(???) ,all received lights are defective/factory rejects? Ric-CN,can you explain that?

Don’t mistake my post #442 as describing a problem. I see no more imperfections on the two lights I received than what I’ve seen in Supfire reviews or on my own SolarForce lights. Out of the 4 extensions I received one had a knurling error, but I doubt that I received factory rejects. To me it looks like it’s probably typical Yezl quality (although I’ve never had a Yezl before).

Gj wrote:

dangerous wrote:
I don’t like the ui with 2 switches where you have to turn it on/off with the tail switch and switch modes with the side switch.

So why did you buy it? The UI was well documented beforehand.

He’s got to buy it and try it before he’s sure he doesn’t like it…. I think it’s fair to purchase something and then advise others that you don’t really like it. I’m not really sure what I’ll think of the interface either! We’ll just have to see ;-).

Tom E wrote:

wight wrote:
Sounds like good work. FWIW I just want to point out that your lowest value resistor, by quite a bit, is the 0805 sized one. It’s going to be carrying nearly half the current by itself with a 250mV drop across it. Best case scenario it’s rated for 250mW of dissipation, but this is probably 500-600mW. 1206’s are probably rated for 500mW, so switching to one of those could be a good idea, even if you are going to pot it. Other than that, I assume that the baby FET is the weak point. I have not received mine yet. Are the stock sense resistors 1206 or 0805?

0805’s are stock – I should have mentioned that, that’s why I used an 0805. So, you think these are current limiting and not current sensing? I was thinking sensing and that’s why they used smaller ones, but I had no clue.

They are current sense resistors, definitely not current limit resistors. If we know the current going through an object and we know the voltage drop across the object we simply multiply those two things to determine the wattage consumed by that object. In this case we know the sense voltage to be 0.250 and we know how to calculate the current that the driver should produce from a given resistance… we multiply those to get the power dissipated by the sense resistor bank. Then I personally just do a rough hatchet-job in my head to see how power is distributed among the sense resistors. The resistor with the lowest value will get the most current through it.

fellfromtree wrote:
Yeah we have two decent shops here. Whitcom just don’t make enough money selling smd and Sparkey’s didn’t carry R100. I can barely read those dang things as it is. I should go down to schneider electric right next door. They used to be Pelco, make surveillance equip. I’m sure one of the programmers could hook me up.

Pulled 2 off the school thermostat and that’s what I got. Yeah your pretty informative wight Smile Bought 5000 assorted off ebay for 10 bucks already. That should do it, but no flashlight messing for least 3 weeks it looks like. China shipping. Sad

Oh well, I tried. I’ll make my way down to Schneider tomorrow. I’d like to see this thing work so I have enough time to order another one before October.

Edit

I went through the camera, I took this after laying in the first resistor- 100 xd On low I can see the emitter clearly without sunglasses. Kind of cool in a way, like a cool white light. I really hope I can get ahold of a couple spare resistors tomorrow. I should do a WTB on craigslist too like a crackwhore looking for a fix. Wight you sure it can handle 5 amps? Or should I do something more conservative with this. I’d like to push it to it’s limit on high, probably run it med most of the time though. […]


  • The 5000 resistor assortment will not contain what you need. If you need to, please point out anything you don’t understand from my earlier post. Current sense resistors are only used for assembly power supplies (such as these buck LED drivers), and generally only for current limited ones. I would be extremely surprised if you found them in any of the places you are talking about.
  • No, I’m not sure that it will handle 5 amps. If I indicated somewhere that I thought it would handle 5 amps, I didn’t mean to! It might, I dunno. As I mentioned in ohaya’s driver thread, I wouldn’t push it past the point where I hit 70% efficiency. The inductor is big, so let’s assume it can take plenty of current. The schottky diode is marked for 5A, I’d probably not take it past that. The FET is a little tiny one, that might be your weak point at 5A or it might be OK, I dunno.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

dangerous
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What I like about the ui is that the mode is not liable to change without me knowing. The XinTD X3 seems to change arbitrarily, so I’ll never know which mode it is going to start in. The machining is far inferior to the XinTD X3 – the edges are sharper and it feels cheaper because it is lighter. The output seems to be quite high and the battery capacity with 3*26650 is awesome – I have 15+ amp-hour in mine right now.

BLF

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Gj wrote:

They want you to feel safe, let down your guard, then suddenly....you're mupped! Surprised

Laughing

MRsDNF
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I found them, mup snails that is. Took me awhile but I got there. Thanks Dale. Now where is missy?

 

djozz quotes, "it came with chinese lettering that is chinese to me".

                      "My man mousehole needs one too"

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

DB Custom
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You didn’t charge the batteries? Again?

MRsDNF
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What a nice way to start the day. I found Missy. Shes at Maccas, working. LaughingLaughing

 

djozz quotes, "it came with chinese lettering that is chinese to me".

                      "My man mousehole needs one too"

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

Ric-CN
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led4power wrote:

Fake tracking numbers,no explanation why china post didn’t want to ship lights(???) ,all received lights are defective/factory rejects? Ric-CN,can you explain that?

Not fake tracking numbers… CN-FuJian-post run strict safe-security at custom. Many packages returned. CNQG has total 25 packages returned. Among them, 13 returned packages are from this GB. We resent them all by SG registered post.

If you got a defective or scratched Y3, please contact me via cnqualitygoods@hotmail.com. I will take care of it.

BTU flashlight; DQG Series Flashlight ; Torch Component

southland
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These are budget lights, a scratched light doesn’t need to be replaced, lots of budget lights have scratches. Mine have scratches but I won’t be asking for a replacement. If it were a Fenix, Jetbeam, or Olight, that’s a different story. You have to be realistic in what you will get with a budget light. Both of my lights were packaged well by Ric and were definitely not scratched in shipping, they had to be that way from the factory.

dangerous
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Is the AR glass supposed to be the one that came separately?

BLF

southland
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yes

aoeu
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southland wrote:
These are budget lights, a scratched light doesn’t need to be replaced, lots of budget lights have scratches.

Exactly!

Cereal_killer
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dangerous wrote:
Is the AR glass supposed to be the one that came separately?

hold both lenses so that you can see the reflection of a light bulb in them, the AR one should look purple/blue/greenish

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

dangerous
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Thanks, I noticed the AR has the blue reflection when I got it, but I’m used to AR having a green reflection from eyeglasses.

BLF

fellfromtree
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wight wrote:
* The 5000 resistor assortment will not contain what you need. If you need to, please point out anything you don’t understand from my earlier post. Current sense resistors are only used for assembly power supplies (such as these buck LED drivers), and generally only for current limited ones. I would be extremely surprised if you found them in any of the places you are talking about.
  • No, I’m not sure that it will handle 5 amps. If I indicated somewhere that I thought it would handle 5 amps, I didn’t mean to! It might, I dunno. As I mentioned in ohaya’s driver thread, I wouldn’t push it past the point where I hit 70% efficiency. The inductor is big, so let’s assume it can take plenty of current. The schottky diode is marked for 5A, I’d probably not take it past that. The FET is a little tiny one, that might be your weak point at 5A or it might be OK, I dunno.

So 5.5a it is! Smile I’ll put in 2 R090 and do a quick shot on high to see what it’s like. Might just go with one R090 in the end, but if you don’t see the limits you’ll never know the safe ground to play around. Those diodes can take a bit more than rated thinking. The fet I can always custom sink by running some copper sheet to the side of the pill. I’ve had to cool small fets before from bad design on a video card and it worked perfect. But that was with active cooling. That’s the thing with lights is your only good for so long at the high end and it’s lights out. It might be worth 5.5a though as your not going to be abusing that hopefully. I might make mine 5.5 and my brother in laws 2.75 with one resistor. Then I can say mines bigger than yours, but I’ll know it’s not going to last lol keep it on med most of the time.

I got those resistors off mouser, but they are 1206. The 5k pack from China I guess can store that away. Sad That could have been a battery

wight
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Meh, it’s not a bad thing to have a ton of resistors :-).

Do we have “at the emitter” measurements for this light? The stock resistors should give 3A at the emitter already.

Just know that if you are “pushing” this board enough to make the efficiency drop significantly you are losing a ton of runtime and being hard on the driver at the same time.

Still fine, still on a break. One day I’ll catch up with you folks! previous wight catchup Wink
list of my drivers & variants (A17DD, FET+1 stuff, WIP stuff, etc)

fellfromtree
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I need to measure that next time at the emitter. I can measure that when get the stuff in. It’s still in moonlight mode

Cereal_killer
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My tracking number is still not working, I asked Ric and he said it wasnt one of the returned ones and said he was going to ask the shipper for help tracking it but I havent heard back yet.

 RIP  SPC Joey Riley, KIA 11/24/14. Now I am become death, the destroyer of worlds.

antiparanoico
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I’m still waiting for mine. Sep 8, deadline Paypal. I sent email to CNQG.

If anything can go wrong, it will.
Matter will be damaged in direct proportion to its value.

nofearek9
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same here I hope I will get it this week.

MRsDNF
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I received mine yesterday and it did have two postage's on it. One from when it got sent out and returned and the second one for the second time it got sent.

 

djozz quotes, "it came with chinese lettering that is chinese to me".

                      "My man mousehole needs one too"

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

Werner
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Mine arrived today. :bigsmile:

Glad that I ordered a lens the stock one is foggy…

applevalleyjoe
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If it’s not too late, put me down for 1 “B” and 1 extra AR lens. Whom do I pay and what is their PAYPAL address? Thank you.

nofearek9
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locusto03
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applevalleyjoe wrote:
If it's not too late, put me down for 1 "B" and 1 extra AR lens. Whom do I pay and what is their PAYPAL address? Thank you.

 

http://budgetlightforum.com/node/33637 Smile

Werner
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I just was outside and shined along my way and I like this light a lot. Thanks for the Group buy. The lens is really nice, thanks ric for comin up with that. I would order another lens just for spare if someone could tell me how to select tracked shipping in the shop…

Just for reference I also can influence the output by the used batteries. I tested Ncrb, 26650, lg 4.35V cells and each gave 5% more output. So the regulating seems to be a bit voltage depending. A quick measurement gave around 800lm and 48kcd so that seems in the range others have mentioned.
The driver is really smart, works with one to 3 batteries and has undervoltage protection for each amount of cells. I am impressed.

Have I understand it correct that a resistor mod don’t works for one cell use?

And another question: what is that?

Or better why was this in my envelope? Have I missed something.

MRsDNF
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It appears you have a bonus werner.

With my very limited testing you may well get a slightly higher output on on battery using the higher voltage cell.

 

djozz quotes, "it came with chinese lettering that is chinese to me".

                      "My man mousehole needs one too"

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

arekm
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Tons of tiny scratches on mine :-/ Got it today. Package looked fine, so I assume scratched before transportation.








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