Test/Review of LD-33 Triple XM-L 2.6A 9-17V Circuit board

[MRsDNF]

@RaceR86

I had one of these in the past. Not sure if I killed it, or of it wasnt working properly. Guessing it was me… Same mistake… Was just going to do a quick test on a single emitter… Bad idea… Afterwards the driver was pretty much direct drive and did not work properly at all. Never used one afterwards… I have a feeling the driver will die if you use it on a single emitter and 2-3 cells. And so will the emitter as long as its basically direct drive with too high voltage…Recieved two LD-33 drivers today… Might use one (or two?) for my contest build… Ill do some testing beyond what they are really supposed to do… Ill update if I ruin them.

This sounds like it. If I damaged the driver on the single led and then hooked three leds up and the driver was direct driving 3 leds of the power supply it could well of killed them.

[RaceR86]

btw, sorry to hear about your loss Steve.

In case you want to buy more of these drivers:

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Quantiy of 5 from Aliexpress. 5,7$ a piece (this seller can usually lower the quantity, atleast if you buy other items from him)

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[MRsDNF]

Thanks RaceR86. That's where this one came from.

[CosmoKramer]

How does the driver sense the number of batteries? I want to use it with 10*NiMh (AA) thus the settings for 3* LIPO would be perfect… 4*LIPO-Settings could eventually start “flashing” too early.

[HKJ]

@CosmoKramer

How does the driver sense the number of batteries? I want to use it with 10NiMh (AA) thus the settings for 3 LIPO would be perfect… 4*LIPO-Settings could eventually start “flashing” too early.

It looks at the voltage. As you can see I did my test for 3 batteries starting at 13 volt, this means that somewhere above 13 volt (And not much above) it will assume 4 batteries.

[CosmoKramer]

It’s a shame My Pack starts at 13,5 :-\

[g_sintornillos]

Does this work with 1xMT-G2 and 3x18650 (3S)? http://cnqualitygoods.com/goods.php?id=1633

[comfychair]

How does it know the difference between 3 cells at 4.0v each (12v) and 4 cells dead empty at 3.0v each (also 12v)? :~

[HKJ]

@comfychair

How does it know the difference between 3 cells at 4.0v each (12v) and 4 cells dead empty at 3.0v each (also 12v)? :~

Usual empty cells are more like 3.3 volt and that is just at the switching point.

This also means that if it once report cells empty, it is a bad idea to turn it off and then on again, because then you risk detecting the 4 cells as 3 cells.

[smoll]

@HKJ

The “Key” is not a mode change or a on/off switch.

It will increase the led current slowly when shorted, it goes up to 3.5A led current. The increased value is stored for that mode and I did not find a way to reduce the current again. I.e. my driver now has 3 modes, each with 3.5A through the led.

Continuous short circuit increases current. Short-term short circuit reduces. It is also possible to disconnect absolutely.

[Hemionline]

Hi guys! My ld33 drowned, and apparently, one smd fell off and dissapeared , who can tell what was there?