Please build me a single AMC7135 driver on 10mm MCPCB. Please make it less than $2.5 cents.
P.S. I don’t expect everyone to understand.
Thank you.
Hi vegas, the easiest way to do this would be to simply order a single 7135 chip and solder wires onto the end. (around 1 dollar a piece) Or do you need modes? If you need modes then you would have to buy a 7135 based driver (around 3-4 dollars a piece) and remove a bunch of chips.
Sounds like someone is building a regulated AAA light.
Yeah, sounds like a cool project. Here a link to a 7135 is shipped from the US, it is 55 cents plus shipping.
Not AAA but 10180. I was inspired recently by a post Craig made about the quantum dd.
No modes required. Well, except on and off.
Oh, yourlien version of the quantum DD are you planning on using QTC or just a 7135 chip? Either way I'm interested to see it. :)
Sent From my Iphone
Are QTC pads still available anywhere?
Nothing to see at the moment, it exists only in a corner of my mind, but it’s a definite maybe.
Single 7135 not the right part for this unless you’re using some strange 350ma emitter.
Shaotech has 3 for 3.50 or 10 for 10.
I think agent hex is right though, I would go for at least 750 mah. (2)
The limitations don’t lie in the emitter but in the battery. Sometimes you don’t need a very large hammer but instead one that is the right size for the job.
Linear regulator doesn’t limit current from the battery.
I am not understanding that. Of course it does.
Anyhow, here is some more inspiration. What a beautiful light.
http://www.cpfreviews.com/Orb-Wee-NS.php
You're trying to convince me to use the right hammer for the job? Keep in mind I'm making a triple xm-l p60. :D
I mean power. Though I guess on second thought a 10180 is tiny and voltage across will drop significantly.
Yes, Peukerts law definitely applies here. I will be on the lookout for a very low Vf emitter. I need to gather more data. How about XP-E 2 or Nichia 219? Or even Rebel PW51-90 I am sitting on a pile of those.
Is 10180 so bad that Vf really matters? There are <=15mm boards and not sure if you can remove the unwanted 7135’s and cut/sand off to be small enough, and hope the core contains all the necessary connections. Like this very simple board: http://dx.com/p/2-7v-6v-3w-cree-circuit-board-for-flashlights-15mm-2-7mm-25518?item=5
I don’t have the battery in hand to test, so hard to say. LiCO2 batteries have a relatively flat voltage of course, but it would be nearly a 4C discharge rate.
Seems like the XPE2 would be a good candidate to maximize runtime.