Modded: Small Sun ZY-T13 3.2 Amps or Sunwayman T40CS Clone

244 posts / 0 new
Last post
agenthex
agenthex's picture
Offline
Last seen: 6 years 5 months ago
Joined: 07/14/2010 - 04:49
Posts: 3070
Location: Merica

The stl’s do have undervoltage protection.

Reading this makes you smarter: http://lesswrong.com/

ILIKEFLASHLIGHTS
ILIKEFLASHLIGHTS's picture
Offline
Last seen: 1 year 7 months ago
Joined: 08/04/2011 - 23:47
Posts: 5693
Location: southeast MO

Well I liked mine so much for the price I just got done ordering another one. You can’t beat this light for the price. The best budget light going for the money in my opinion.

agenthex
agenthex's picture
Offline
Last seen: 6 years 5 months ago
Joined: 07/14/2010 - 04:49
Posts: 3070
Location: Merica

Does anyone have an MXDL turbohead light or ebay equivalent to compare to this one? Thanks.

Reading this makes you smarter: http://lesswrong.com/

Chicken Drumstick
Offline
Last seen: 3 months 4 weeks ago
Joined: 08/27/2012 - 05:00
Posts: 2389
Location: UK

Op hows this flashlight going? Any issues after you modded it?

blueb8llz
Offline
Last seen: 5 hours 7 min ago
Joined: 06/02/2012 - 01:16
Posts: 3022
Location: California

awesome mod. does it throw as far as a stl v2/v6 now?

zeremefico
zeremefico's picture
Offline
Last seen: 1 hour 10 min ago
Joined: 03/27/2012 - 02:44
Posts: 1335
Location: Greece

Can someone tell us how can we solder the three legs of trimpot?

₪₪₪₪ ΟΥΔΕΝ ΚΡΥΠΤΟΝ ΥΠΟ ΤΟΝ ΗΛΙΟ ₪₪₪₪

My YouTube channel

Flashlights & edc gear

K40M F16

Electroman187
Offline
Last seen: 11 months 1 week ago
Joined: 03/07/2011 - 18:47
Posts: 223
Location: New Hampshire

You’re using it as a variable resistor, so connect the center lead to either of the other leads and just use those two connections. I’m a little weary of using a trimpot for this application though. What kind of trimpot, what power rating/current, etc… Trimpots aren’t generally made to handle much current.

DarkSide
DarkSide's picture
Offline
Last seen: 2 years 6 months ago
Joined: 06/04/2012 - 01:50
Posts: 792
Location: NYC

Has anyone simply swapped out the driver for proper output? The side switch is nice
but i’ll throw it overboard to save the LED

 


CheapThrills
CheapThrills's picture
Offline
Last seen: 1 hour 56 min ago
Joined: 07/02/2011 - 10:45
Posts: 3615
Location: Suomi

OK, great instructions!
I received the light today and IMO it is a very good light for the price paid.

I ordered some 0.68Ohm resistors, I hope they are “close enough”. 2 or 3W, they were one or the other…

One question though:
Which way should I solder it, blue or red?

AlexGT
AlexGT's picture
Offline
Last seen: 5 hours 35 min ago
Joined: 06/07/2012 - 17:39
Posts: 4413
Location: Texas

I looked at the board from the back using a strong light and both resistors seem to be soldered in parallel, anyway I soldered the trimpot at each side of the R200 resistor.

EDIT, PLEASE READ:

I noticed that the resistor values from your board are 150 and 200 mine were 220 and 220, IMHO your light has more amps driving the stock led than mine had in stock form, check the current at the tailcap, I think the resistor you got will overdrive the led.

AlexGT
AlexGT's picture
Offline
Last seen: 5 hours 35 min ago
Joined: 06/07/2012 - 17:39
Posts: 4413
Location: Texas

CheapThrills STOP!

I just noticed that the resistor values on your board are different from mine! Please measure the current at the tailcap from the stock board and report back before you mod anything!

I think you are going to overdrive the led with that resistor!

AlexGT
AlexGT's picture
Offline
Last seen: 5 hours 35 min ago
Joined: 06/07/2012 - 17:39
Posts: 4413
Location: Texas

Looking closer at the board in your light it looks different from the board in my light, mine has 2 additional electronic components near the resistors and yours does not (one look like a diode to me, the other I have no clue!) I would recommend to NOT MOD IT until someone more knowledgeable in electronics takes a look at your board and chimes in.

CheapThrills
CheapThrills's picture
Offline
Last seen: 1 hour 56 min ago
Joined: 07/02/2011 - 10:45
Posts: 3615
Location: Suomi

Hi!

Sorry, pic is just for reference from another thread. AFAIK it is not even the same driver.

I have the light at me now but I have not yet even disassembled yet since I´m still waiting for resistors.
So, no worries yet Wink

Anyway, the way “blue” would be the preferred?
(will post pics later from actual driver)

DARCANGEL
DARCANGEL's picture
Offline
Last seen: 4 months 3 weeks ago
Joined: 04/11/2012 - 00:06
Posts: 960
Location: the nickel city,New York

AAAAAAAAHHH! just as this thread is resurrected,my zy-t13 died,put both batteries into protection and does so to other batteries too.Don't have time to diagnose,but this sucks I really like this light.If anyone knows of a decent 8.4v low PWM driver@3 amps or so,I'm open to suggestions.I don't really care about the side switch at this point.

Sigster
Offline
Last seen: 4 months 1 week ago
Joined: 01/10/2012 - 13:33
Posts: 72

Had some time so I took some measurements.
Supplied the driver from a power supply, read supply current from power supply display.
Measured LED current with a current probe connected to an oscilloscope.
There’s some wiggle-room to my results since the LED star wasn’t mounted on anything,
I only always quickly powered on, took my readings and powered off.
But the LED will have heated up a bit.

The 0.22Ohm resistors on my driver board are in parallel, resulting in a combined resistance of 0.11Ohm (=110 mOhm)
The resistors are in the input-current path of the driver.
Input power is a fairly constant ~7.5W
Output current to the LED is a fairly constant 2.05A
(2.1A at 6V VBat to 2.01A at 8.4V VBat)
Calculated efficiency is ~80%

I made some calculations for resistor values but they turned out to be a bit off, maybe because of temp influence.
I had calculated that I’d need ~370mOhm in parallel (—> 85mOhm resulting resistance) to get to 2.5A

All I had available were 1 Ohm resistors, so I soldered 2 of them in parallel (—> 500mOhm added in parallel, resulting resistance 90mOhm)
And those actually gave me 2.5A at the LED.

Then I added another 1 Ohm resistor in parallel (—> 333 mOhm added in parallel, resulting resistance 83 mOhm)
With those values I got 2.73A at the LED.

I stopped there.
Based on the measurement results I calculated that if you want ~3A through the LED you’ll need to add ~227 mOhm in parallel to the existing 2×220 mOhm resistors. The overall resistance then would be ~75 mOhm.

The 2× 220 mOhm (=0.22 Ohm = R22 listed on the components) on my driver board are 0805 SMD components,
in case you want to buy the same size for easy piggy-back.

Quick summary:


LED current Total R R that needs to be added in parallel
[A] Ohm Ohm
original 2.05 0.11 N/A
tested 2.5 0.09 0.5
tested 2.73 0.083 0.333
calc. 3 0.075 0.227

-S

CheapThrills
CheapThrills's picture
Offline
Last seen: 1 hour 56 min ago
Joined: 07/02/2011 - 10:45
Posts: 3615
Location: Suomi

I added one 0.68Ohm resistor parallel to those R22 resistors and got about 1.17A of draw.
I´m now recharging for readings with a full set of batteries.

edit: Full batteries and 1.10A draw.
Ordered some R22 SMD resistors, thanks!!

Ecig
Offline
Last seen: 7 years 4 months ago
Joined: 04/28/2012 - 22:37
Posts: 807
Location: Switzerland

I dont want to opet a new topic about this so Ill try to get an answer here.

Well, I have 2 SMall SUn ZY-T13, and with both I have same pronlem, they are shorting out.

I dont know exactly where and thats troubling me…

Anyone other had that experience.

Driver placement in this flashlight, with that alu-ring on top of it, is littele messed up.
Probably driver is shorting out somewhere butits hard to tell where.

One is with stock driver, and the other is with ST50 (not sandwich) driver. But forget about that modded one, I wanna concentrate on this one with stock driver.

I really dont know whats happenining and where this short occurs, because, because of mnessed up driver placement, there are many possibilities, and Im not so experience to huess what would be most probable source of shorting…

Pulsar13
Pulsar13's picture
Offline
Last seen: 11 months 3 weeks ago
Joined: 02/05/2012 - 10:23
Posts: 1909
Location: Malaysia

Ecig wrote:
I dont want to opet a new topic about this so Ill try to get an answer here. Well, I have 2 SMall SUn ZY-T13, and with both I have same pronlem, they are shorting out. I dont know exactly where and thats troubling me... Anyone other had that experience. Driver placement in this flashlight, with that alu-ring on top of it, is littele messed up. Probably driver is shorting out somewhere butits hard to tell where. One is with stock driver, and the other is with ST50 (not sandwich) driver. But forget about that modded one, I wanna concentrate on this one with stock driver. I really dont know whats happenining and where this short occurs, because, because of mnessed up driver placement, there are many possibilities, and Im not so experience to huess what would be most probable source of shorting...

Did you remove the LED centering ring?

Ecig
Offline
Last seen: 7 years 4 months ago
Joined: 04/28/2012 - 22:37
Posts: 807
Location: Switzerland

No…

its not shorting from the reflector.
Im pretty sure that driver is shorting somewhere, maybe that retaining ring too.

Im pretty sure that this setup has design flaw somewhere, but I didnt succed oto pinpooint it yet…
Because I think there is lots of weak points and possible shorting points here…

FOr example driver (+) spring and driver retaining ring
retaining ring and bottom of the driver.
Other side of the driver with insides of the “tube” or “pill”, dont know how to call it (on the side or to the emmiter side)
Mybe I forgot something – but its not reflector…

Ecig
Offline
Last seen: 7 years 4 months ago
Joined: 04/28/2012 - 22:37
Posts: 807
Location: Switzerland

Heh, little update.

It seems it is not shortcircuit after all.
I thought it was shortcircuit just because of sparks sometimes occur on the en of the battery-tube – weather when Im screwing on the tailcap (you can even here small crackling noivces), or when I close the circuit by some metal or scissors.

I dont know why this occurs, but it is not short-circuit (as flashligtht wouldnt shine with short circuit, as my friend explained to me – i dont know much about electricity).

SO, its basically some sparks when there is weak connection on the tailcap – its not short circuit…
When tailcap is screwed all together everything works fine.

….Also, just to tell you guys, these are somewhat good flashlights (especially that big head and reflector, but with cheap driver and internals — so output heavily varies from unit to unit.
SOme units are brighter, some are less bright. Also hotspot is not always the same…

Ive modded one unit with P7 3,0A (1,5A measured at the tailcap, 1,0A with stock driver) driver from lightmalls and Im satisfied, but it doesnt have mode memory quick as I hoped….

Pulsar13
Pulsar13's picture
Offline
Last seen: 11 months 3 weeks ago
Joined: 02/05/2012 - 10:23
Posts: 1909
Location: Malaysia

Dude! I just threw 500m with this thing!! Holy smokes!

Only mod was 2x(0.47ohm) to get ~1.55A. And of course, a perfect dedome.

I got back at night, and I just came across a a bird's nest building in the middle of paddy field (they're huge, and white). And since I brought my T13, I just had to try. BAM! Clear as daylight. Metaphorically of course, but you get the point.

Google Earth told me it's 500m. Sadly no pics, didn't bring camera at the time. Will try again next time I go through there.

CheapThrills
CheapThrills's picture
Offline
Last seen: 1 hour 56 min ago
Joined: 07/02/2011 - 10:45
Posts: 3615
Location: Suomi

OK….
I think I got the wrong resistors or something:
Bought these for a couple of bucks : http://www.ebay.com/itm/261113307852?var=560163266936&ssPageName=STRK:ME...
R22. Now, is it 22Ohm or 0.22Ohm?? The first one would explain, why I cannot get it working properly no matter how I solder it!

Sigster
Offline
Last seen: 4 months 1 week ago
Joined: 01/10/2012 - 13:33
Posts: 72

They only list a 22R, which is 22Ω

What you’d need is one that says R22 or maybe also 0R22

-S

CheapThrills
CheapThrills's picture
Offline
Last seen: 1 hour 56 min ago
Joined: 07/02/2011 - 10:45
Posts: 3615
Location: Suomi

Sigster wrote:
They only list a 22R, which is 22Ω

What you’d need is one that says R22 or maybe also 0R22

-S

Oh bugger… I soldered it about 4-5 times and thought, that can I really suck this much in soldering? Tired
Good thing is, I apparently don´t suck that much. Bad thing is, I don´t have the right resistors…

Any links where to purchase? Intl shipping mandatory…

Pulsar13
Pulsar13's picture
Offline
Last seen: 11 months 3 weeks ago
Joined: 02/05/2012 - 10:23
Posts: 1909
Location: Malaysia

Too bad for that mistake. SMD resistors are a problem, so many standards. Normally you would need a R22 or 220 (note the underline) for 0.22ohm. Not easy to find.

I just use a standard 1W pin resistor. A little big but fits just nice if you trim properly to size.

http://www.ebay.com/itm/NEW-50-X-Resistor-0-22-Ohm-1W-5-Carbon-Film-/220...

CheapThrills
CheapThrills's picture
Offline
Last seen: 1 hour 56 min ago
Joined: 07/02/2011 - 10:45
Posts: 3615
Location: Suomi

Ordered some standard ones. I first had even bogger in size resistor so I believe I can fit these ones also.
Now, again, for the wait…

CheapThrills
CheapThrills's picture
Offline
Last seen: 1 hour 56 min ago
Joined: 07/02/2011 - 10:45
Posts: 3615
Location: Suomi

I will just post this pic here, did it without pot and with relatively large (physical) resistor:

Please, use even more time than me to first bend those legs so, that they FIT and sit STILL easier.
Saves time, trust me.

Draws 1.49A dead Steve

CheapThrills
CheapThrills's picture
Offline
Last seen: 1 hour 56 min ago
Joined: 07/02/2011 - 10:45
Posts: 3615
Location: Suomi

I will paste it here, also:

If someone of you guys need a 0.22 Ohm resistor but don´t want to wait forever ordering from China or don´t have Electronics shop near you, PM me.

I can send some of those to you, probably won´t need all 20 anyway Big Smile

how2
Offline
Last seen: 5 years 4 months ago
Joined: 06/01/2010 - 10:26
Posts: 2416
Location: london

There is a Ultrafire version of this light at Banggood for $26.35

Werner
Werner's picture
Offline
Last seen: 6 months 1 week ago
Joined: 10/19/2012 - 15:00
Posts: 3679
Location: Germany

Someone have a Chinese source for these trim pots?
I only found these http://dx.com/p/3296w-trim-pot-trimmer-potentiometer-blue-30-piece-pack-... for cheap, but the smallest one begins with 100ohm so not much adjustspace like a smaller one, 1 turn probably more than 3 ohm…

I have ordered the light on the wallbuys promotion and don’t want to wait another two weeks when it has arrived. I have some 1/4W axial resistors on order with values below 1ohm but I think a pot would be my favorite.

Pages