KD (kaidomain): Deals and new products thread

I may have misunderstood this, but i thought FET drivers are not constant current or current limited?
It just PWMs full blast, doesn’t it?
And aren’t there FETs in a 7135?
My question is actually: what’s the voltage drop over a FET and over a 7135?
if it’s almost the same i would prefer 7135s.

Switched on in banks of 1, 2, 4 and 8 for total of 15 x 7135 or 1, 3 and 9 for total 12 x 7135 or 1, 2 and 4 for 7x…etcetera…

Check the link

Thanks ! :smiley:

Edited: What the hell? User DEL published a convenient explanation with regards to what I was saying about AMC7135 switch-on times, and now it's gone?

Fellow DEL, deleting your contributions is of no service to us. :-/

Related thread link I dug up from my browser's history: https://budgetlightforum.com/t/-/35447/250

Thanks (DEL) for the explanation and all that information. I started to presume the Pratik Panda guy made some sort of mistake with the scale while determining the switch-on/switch-off times, because I just couldn't figure what the hell was going with those oscilloscope screenshots timebase, lenght of pulses and their stated PWM frequencies (?).

Yes, there I can see the 6-8μs turn-on time, with a 50μs duty cycle pulse, and he is speaking about a 2KHz PWM frequency, which is a 500μs long period… bah, nevermind, there's too much stuff I was supposing.

He said turn-on + turn-off times to be ≈12μs (83.3+KHz), and it didn't made much sense to me that the regulators could be having so much trouble with 9.375/18.75KHz frequencies.

Jerommel, I guess you'd like to drive a sort of tiny 7135 DAC. Doubling the driven regulators per pin each time, with just 3 pins we could drive from 0 to 7 regulators in parallel (and PWM combinations). You said 15, that's 4 bits (maximum unsigned integer value for 2n, n being the number of bits/outputs).

Cheers ^:)

Originally posted on Thu, 12/08/2016 - 20:56; edited for fixups and clarification.

Well,my own plan is to just use a 6x 7135 Ak47 or 105 driver and add a momentary switch to engage an extra bunch of 7135s for turbo mode.
This way you can not leave it on in turbo and when too hot you will let go of the button (which would be in the head of the flashlight).
We’ll see…
But i’m not into electronics, PCB design and / or chip programmng at all, but i like the idea of a momentary turbo button.

You said it all, Jerommel. 7 regulators driven by the microcontroller (3 bits/outputs), plus your “magic trigger” to enable the wild bunch…

Cheers ^:)

The 380 mA 7135’s pre-populated on QLites are bad? or generally all 380’s (such as these from Fasttech ) fall out of regulation?

The properties are different. Sorry, don't understand it all, but for example with a 350 7135, you can get down to a PWM value of 2 or 3, while with a 380 you can only go as low as 4 or 5. So the 350's have a better range. I don't think it's as simple as binning them differently. The problem is the 7135 has gone obsolete years ago, so what's on the market now is clones, or clones of clones, so I wouldn't trust the specs you can find, or even the source. TK says there's even differences between 350's, so it's a difficult part to depend on for specs. The ones from FastTech seem to have been consistent. I've had many buys from them over the years, sometimes by the 100, sometimes by 10-50. Also the 350's over perform a little, while the 380's under perform a little, so really there's not much difference. Forgot where but more recently, a few of us were posting about 7135's and pretty much all agreed the 350 were the better ones, and to stay with them. It's what we use now in populating the FET+1 drivers, and the triple drivers.

Maybe this thread should be renamed to "KD Deals and endless esoteric discussion about things not Deal Related that makes you regret your last numerous visits to the thread to hear about the new KD deal and actually is not a deal but a continuation of the endless discussion about some unrelated esoteric concept that should have been taken to a separate thread and then wanting to stab yourself in the head for being so dumb to return to the thread Thread".

That’s a bit long for a topic name though… :stuck_out_tongue:

Pretty esoteric what you did there.

+1 to both! :wink:

I wouldn’t give such a long name to a topic, but ImA4Wheelr’s point of view is right. This is a topic regarding KD Deals and new products thread. That’s why I’ve subscribed, not for “endless esoteric discussion about things not Deal Related”. I also keep on returning to see a new deal, just to get another frustration when I see it’s one more off-topic post.

So… please make a new thread to discuss whatever off-topic (at this thread) you want. :beer:

Hi friends,

Maybe I will create another new thread for listing some common flashlight D.I.Y Parts & Accessories in KD.

Thanks for yours’ supporting to KD.

Thanks

Ban

Hi BanL , i received 2 of this order its bright, i luv it but one was dead on arrival. i only realized it after i spend all the work mounting it and it doesnt work, no light or flash just nothing ,very anticlimax :weary: . i know its rare but its the first time it happened to me. i tried to email but got no reply , is there some sort of guarantee cause i waited some time to do it and there will be more delays from this? Thanks.

Should not be neccessary, what is really needed is stopping the esoteric stuff here.

Btw, thanks for listing the triple DTP-board :slight_smile:

Agreed. Your thread is great the way it is. My post was just a light-hearted attempt to ask folks to let this thread return to it's intended topic.

Hi

Sorry for any inconvenience cause to you.

You can PM me your order number or contact our sales support sales@kaidomain.com

I would help to follow your problem and see how to solve it.

Thanks

Ban

I’m about to order a triple nichia 219BT 5700K 92CRI, can anyone confirm is that triple MCPCB works with the carclo optic?

http://www.kaidomain.com/p/S022933.Triple-Nichia-CRI92-NVSW219BT-V1-5700K-LED-Emitter-with-20mm-x-1mm-DTP-Copper-PCB-Parallel-w-optics

It comes with an optic.
Would a Carclo be significantly better?

I think all the KD triple emitters come with an optic.
Been staring at the KD optic and the pic of the Carclo on Mtn. I can not see any differences, really look identical too me. But I don’t have the KD in hand to check on a Carclo.