Review: KD 7135 V2 drivers 3040/2280/1520 mA with mode configuration

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lhartman89
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Itinifni wrote:
Make sure you didn’t bridge the LED – wire to the outer ground ring on the driver, I believe that will leave you with one mode at direct drive.

Also make sure that same wire is not grounded to the pill.

Thank you, that was my problem. Now I got it working, but low isn’t working. When I go from med to low, it flickers and then nothing. I can’t figure out what is wrong with it.

Itinifni
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Hmm, high and med but no low, you got me on that one. When you say nothing happens do you mean the light turns off or remains on medium?

I remember a time, when I searched for lights to fit my needs. Now I search for needs to fit my lights.

lhartman89
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Turns off, but when I half press the button it will switch back into high. I have no idea. I think I am just going to solder S3 and S2 to get high and medium only.

davidwf
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Just received 5 of these from KD….pretty impressed so far

I (wrongly ?) assumed that “regulated” meant the LED current would remain fairly constant until the battery was flat…..looks like I was wrong on this assumption as it drops markedly between 4.2 and 3.6V …..comments ?

Itinifni
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But I believe current to the LED should remain in regulation until battery voltage falls below forward voltage of the LED. After that it effectively becomes direct drive, on high anyway.

I remember a time, when I searched for lights to fit my needs. Now I search for needs to fit my lights.

davidwf
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Yes, that is what seems to be happening…….some driver circuits boost the current to keep it the same until the battery is totally flat (I believe they are known as boost / buck regulators)….that is what I was hoping for but I can live with it Smile

jimmyjjohn
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Some manufacturers sort the 7135’s in bins. I have a NANJG 105 with 7135’s marked “35V”. This stands for 350 mA.

You can see on the picture of the KD V2 driver that the 7135’s are marked “38K”. This is the 380 mA bin.

Thanks
saldatrice inverter

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