Test/Review of Qlite Rev.A 7135*8 Multiple Modes Circuit Board 3.04A

44 posts / 0 new
Last post
MountainKing
Offline
Last seen: 2 months 1 week ago
Joined: 12/01/2011 - 03:20
Posts: 2273
Location: Lost Islands ™

Thank you Sir. Nothing to add Smile

Never ever forget and forgive. Niwal**er new kid on the block trying to act tough.
http://budgetlightforum.com/node/24847
Do not support this brand.

DINODIRECTSCAM COMPANY. DO NOT BUY
http://budgetlightforum.com/node/11324?page=2#comment-254983

Bort
Bort's picture
Offline
Last seen: 1 week 4 days ago
Joined: 06/01/2012 - 17:15
Posts: 7458
Location: Holding the proverbial flashlight
unknown00101 wrote:
Bort wrote:
this may sound crazy, but is the room dark enough when you test moonlight?

Mildly lit room, but staring directly at the emitter and there’s not a hint of light… well that’s interesting. Still in the same room I checked again to be thorough and there is the tiniest, slightest bit of light coming out of the emitter, but it is flickering quite a bit.

Moving into a pitch black room, there is so little light that it doesn’t show up unless almost point blank.

And after turning it back off it’s gone again. Not even the slightest bit of light coming from the emitter in moon mode.


Hmm.

I’ll heat it up in an old skillet in the morning and apply some light pressure to the emitter.


Mr pyro mentioned a problem with moonlight mode on many of his Qlites, there is a thread about it

The Journal of Alternative Facts TM

"It is critical that there is a credible academic source for the growing and important discipline of alternative facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists"

 

Lothar
Lothar's picture
Offline
Last seen: 56 min 15 sec ago
Joined: 10/26/2011 - 11:22
Posts: 522
Location: Stellenbosch, South Africa

I've got a question regarding the memory of the Qlite.

The way I understand the memory, the memory sets in after 2s of use. So if you use the light on mode 1 for longer than 2s, and you want to change to mode 2, you have to do 2 x short-clicks, as the first short-click will return the saved mode, which will be mode 1. I've read that there are mods which can transform the Qlite into off-memory, but that would require custom programming too.

What I want to know is: is it possible to remove memory altogether, but keep the modes. So as an example, when you turn on the light, it will always turn on in mode 1. If you use it in mode 1 for longer than 2s, and you do 1 x short-click, the light will go to mode 2, and so on. If you switch off the light and put it back on, it will start again in mode 1.

Thanks

Current Collection:

BLF: BLF-GT90, BLF-GT70 (CW Sliced), BLF GTmini, BLF-LT1; 

BTU: Shocker (3 x SST-40 @ 8A)

Solarforce: L2P (XM-L2 U3 @ 4A), MPP-1 (XP-L HI @ 6A), MPP-3 (3 x XM-L2 U2 @ 12A), M6 (Nichia 319A @ 6A), M8 (XHP-50.2 @ 9A), 9x (9 x XM-L2 U2 @ 2A)

Coming Soon: Lumintop: BLF-GT4; 

WarHawk-AVG
WarHawk-AVG's picture
Offline
Last seen: 3 months 3 weeks ago
Joined: 01/04/2014 - 06:47
Posts: 5071
Location: H-Town

Awesome review...thanks

djozz
djozz's picture
Offline
Last seen: 2 hours 54 min ago
Joined: 09/07/2012 - 17:04
Posts: 16560
Location: Amsterdam

JackCY wrote:
Quote:
The magic is a high speed fan placed close to the driver, i.e. it is much better cooled.
Ha!
Quote:
I cannot answer for what 7135 chips are mounted on the drivers I get.
Sure. I have a few but none 380mA versions and all my 350mA 7135s are marked 35x as in 35 and some random letter, M, P, T, or whatever. Where as on pics in shops I can see on the 380mA versions that they are marked 38x and 350mA versions are 35x. Although those spare 7135s on a reel seem to come from a different supply/manufacturer and are marked differently 7135 1234 etc. So I think they sent you 380mA version with 3.04A instead of 2.80A ;)

Intl-outdoor sells both the NANJG 105C 2.8A and 3.05A versions (same price), (and the Qlite Rev.A version).

comfychair
comfychair's picture
Offline
Last seen: 3 years 9 months ago
Joined: 01/12/2013 - 05:39
Posts: 6198

Lothar wrote:

I've got a question regarding the memory of the Qlite.

The way I understand the memory, the memory sets in after 2s of use. So if you use the light on mode 1 for longer than 2s, and you want to change to mode 2, you have to do 2 x short-clicks, as the first short-click will return the saved mode, which will be mode 1. I've read that there are mods which can transform the Qlite into off-memory, but that would require custom programming too.

What I want to know is: is it possible to remove memory altogether, but keep the modes. So as an example, when you turn on the light, it will always turn on in mode 1. If you use it in mode 1 for longer than 2s, and you do 1 x short-click, the light will go to mode 2, and so on. If you switch off the light and put it back on, it will start again in mode 1.

Thanks

Yes, flash it with nlite and solder the 4th star. Of course, if you're going to do that there's no reason to pay extra for a Qlite, just get the cheapest 8x7135 105c and flash it.

HKJ
HKJ's picture
Offline
Last seen: 8 hours 12 min ago
Joined: 05/24/2011 - 12:23
Posts: 7122
Location: Copenhagen, Denmark

I have analysed the moonlight mode a bit (See review), it is no surprise that there can be problems with it.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

EasyB
Offline
Last seen: 1 hour 38 min ago
Joined: 03/09/2016 - 15:24
Posts: 1826
Location: Ohio

I recently have moved back to simple 7135 drivers for some lights where I really want to have current regulation. I happened to re-read HKJ’s test and was disturbed by the lack of regulation in the lower modes. I searched for some discussion of this but couldn’t find any. A user (also a member here) made a relevant post:
https://www.candlepowerforums.com/vb/showthread.php?378156-Qlite-Rev-A-7...
on the other forum. He found a couple in-flashlight tests that seem to show good regulation in PWM lower modes. This led me to hypothesize that maybe the power source (power supply vs battery) could have some influence on the driver’s ability to regulate current.

I did some tests using a 8×7135 Qlite driver with Guppy FW from mtnelectronics, using the modes: 100%, 50%, and 15%. The LED was an XPL HI. I’ve used two power sources: my adjustable switching power supply and a 18650GA cell. To get the different voltage data points for the battery I used the same 18650GA cell at different states of charge. Below I’ve plotted the normalized current of each mode using the two power sources. The current was measured using a clamp meter. The curves are normalized to the current values: 3.1A, 1.5A, and 0.43A for 100%, 50%, and 15% mode, respectively. The x-axis is the input voltage at the driver in 100% mode.

With the power supply I observed similar poor regulation in the lower modes that HKJ and iamlucky13 observed. With the battery as the power source the regulation was closer to what we would expect: the lower modes mostly stay in regulation until the 100% mode drops out of regulation. So what is causing the difference between the power supply and battery? HKJ observed a slow rise in current during each pulse during PWM dimming and this acts to reduce the average current. So, evidently the battery can pulse the current with a faster rise time, and so suffers less from this effect. I guess any inductance in the power supply circuit could contribute to the slow rise time.

So rest assured that your 7135 drivers regulate pretty well in all modes.

CRX
CRX's picture
Offline
Last seen: 32 min 11 sec ago
Joined: 04/02/2013 - 15:27
Posts: 4058
Location: Scotland
Thumbs Up
djozz
djozz's picture
Offline
Last seen: 2 hours 54 min ago
Joined: 09/07/2012 - 17:04
Posts: 16560
Location: Amsterdam

Interesting stuff that I never wondered but now do want to know :-), thanks for the testing! So even HKJ’s fancy power supplies can not supply a constant voltage as well as a battery. Buck and boost driver also have inductance in the circuitry, would PWM on those that also suffer from this effect? It would be nice to have some scope images to illustrate what is happening here (but perhaps hooking up a scope would even influence the inductance in the circuit).

HKJ
HKJ's picture
Offline
Last seen: 8 hours 12 min ago
Joined: 05/24/2011 - 12:23
Posts: 7122
Location: Copenhagen, Denmark
djozz wrote:
So even HKJ’s fancy power supplies can not supply a constant voltage as well as a battery.

Not when the load changes 1000 of times a second. I usually have a capacitor fairly close to the switcher in these tests, but my test leads add some inductance. Batteries are really good at handling these fast changes.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

iamlucky13
Offline
Last seen: 4 hours 39 min ago
Joined: 06/22/2018 - 09:18
Posts: 669
Location: USA

EasyB, thanks for letting me know about your test.

I might have guessed there could be an issue with a switching power supply, but I did my test with a variable linear supply (I think – heavy transformer inside), which I understood to be have very clean, ripple free output. I guess I could see the fast switching of the load being a problem for the supply, however.

This would explain why HKJ and I both saw poor regulation of a QLite on PWM modes, but Zeroair saw very good regulation on another Qlite in his Okluma. I had concluded it must be poorer quality 7135 chips being used that don’t react quickly enough for a high frequency PWM.

I will have to look for some time in the future to repeat my test with battery to verify I get the same result as your test.

Agro
Agro's picture
Offline
Last seen: 6 hours 8 min ago
Joined: 05/14/2017 - 11:16
Posts: 5607
Location: Ślōnsk

Thank you EasyB, that’s really useful to know.

Pages