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ArcticMyst Security by Avery

445 nM Build review

jbtm

jbtm

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I already graphed and oscilloscoped my driver to know it ramps the voltage up safe enough to keep my diode happy, thank you very much. As long as you dont hit the driver so a wire lets go, and reconnects, your good. Else your going to have a slight issue with a full discharge to a poor little diode :(
 





Hemlock_Mike

Hemlock_Mike

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jbtm -- Here's a little clue I've mentioned many times........

With a CC driver, always add a small -- say 5 ma --- dummy (bleader) load resistor. If something gets disconnected, The regulator won't go to MAX V !!!! I even have dummy loads on my power supplies to prevent the unregulated spike.
Think about it ----
With a CC driver, the resistor won't keep the voltage in range but will discharge the cap when you shut off the input. It's better than nothing.
HMike
 
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Morgan

Morgan

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This is so interesting I wonder when we might see and, "Advanced Experimentation", section?

We need one, IMHO. I might not understand right now but forming one may change that.

Thanks,

M
:)
 
Hemlock_Mike

Hemlock_Mike

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There will be another addition to this thread. WL finally took my order and I have offered a "throw down" to Steve. His 445 vs mine !!! Jay -- I need your best optics!!! Understand that it's easy to crank up the power for a few seconds but I believe here that beam quality will be the issue. Stay tuned......

HMike
 
HumanSymphony

HumanSymphony

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Hemlock_Mike said:
JBTM --

Read the info. If you don't understand what I've said, Don't go there - get a driver.
I really hesitated posting info on direct drive here.

I wish there could be a special forum for advanced testing...........

HMike
Click to expand...
Well, you inspired me to go direct drive :p
I broke my microboost earlier (busted off a chip while screwing host together :()
It seems to be only about ~100mW or so :undecided:
Definitely not as genius as it was at 750mA earlier :p
But this will hold me over until I get a new driver.
Hopefully it doesn't have too much of an adverse effect on my diode.

EDIT: Also, Hmike, have you measured the current draw on yours?

ejalg5.jpg
 
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goninanbl00d

goninanbl00d

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I have offered a "throw down" to Steve.
Click to expand...

Good luck!

Not that you need it, with that monstrosity of a build I'm sure you'll win hands-down :D :D :D

So how did you get the diode and module into the host? Is the inside of the host module-friendly, or did you need a custom heatsink to get the module to fit the body?
 
jayrob

jayrob

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HumanSymphony said:
Well, you inspired me to go direct drive
I broke my microboost earlier (busted off a chip while screwing host together )
It seems to be only about ~100mW or so
Definitely not as genius as it was at 750mA earlier
But this will hold me over until I get a new driver.
Hopefully it doesn't have too much of an adverse effect on my diode.

EDIT: Also, Hmike, have you measured the current draw on yours?
Click to expand...


Your running it direct off of an 18650?

If so, what's the battery current draw at full charge?
 
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HumanSymphony

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jayrob said:
Your running it direct off of an 18650?

If so, what's the battery current draw at full charge?
Click to expand...
Yes, direct off a 18650.
I don't have a multimeter to check, but I'll have access to one in a couple days and I'll see then.
Like I said, the output is low, so I'm assuming the current draw is accordingly low as well.
 
Meatball

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Your cell must have a greater internal resistance than Mike's. What is your cell's rated maximum discharge rate?

EDIT:1000th POST!

-Tyler
 
HumanSymphony

HumanSymphony

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Meatball said:
Your cell must have a greater internal resistance than Mike's. What is your cell's rated maximum discharge rate?

EDIT:1000th POST!

-Tyler
Click to expand...
I don't know, just a cheap trustfire battery, but any li-ion should be capable of 1C or more :p
If my guess of 100-150mW is correct (which I'm basing solely on how much/quickly it burns my skin lol) then the draw should be about 300-350mA.
 
jayrob

jayrob

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Probably low only because the battery is below 4 volts... (guessing)

I would imagine if the battery was holding 4.2 volts, and it was a quality battery like an AW, it would probably kill the diode!
 
sandidgepatrick

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yahh WL screwed up my order as well said they had no record of purchase.....i was one of the 1st to order but didnt matter to them..when i reordered i had to pay shipping without discount....bs hopefully i will get it this summer....NICE REVIEW H M !!!!!!
 
Hemlock_Mike

Hemlock_Mike

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Jayrob ---
I'm betting on the 4.2 volt surface charge on a LiIon cell to be my limiting. Normal cell voltage is 3.7 volts.
This particular diode puts out only 23 mW @ 3.7 V. At 4.0 V, I get about 350 mW and it holds there pretty well. At 4.3 V, I got 1.2 Amps and 1 Watt so I know the diode will take a little more than the 4.2 Surface charge.
When I add the microboost, I will likely set it for about 700 mW.

HMike
 
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