Old 04-19-2012, 03:34 AM #1
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Default CSI This for me...Killed something (GREAT BEAM SHOTS)

I was taking my two 445's outside, I was going to sell one of them, so I wanted to get some beam shots. I first took some pics of (we'll say laser 1) with the one battery, 18650 in it. Then I took some shots of laser 2, which has been measured at 1.2W. The purpose was to say "hey, buy my laser, it has not been measured, but look at the beam output in comparison to laser 2, which has been measured"

So, I wanted some pics of laser 1 with the one 18650, and also with two 18350's. Now , I never knew it would really do this, but I found, upon trying, that when I put two 18350's, the output looked significantly brighter. When I was taking pictures, I wanted to get both "outputs" of laser 1, with both sets of batteries.

I never left two 18350's in laser 1 for that long with it on, because I was just a bit concerned with it, and I also noticed a small, electronic type of burning smell, although, the host itself never got warm. It's got a monster heat sink. Now laser 1 can be seen here:

http://laserpointerforums.com/f39/fs...9-a-72743.html

So anyway, after laser 1 was on for a bit with the two batteries, it shut itself off. Can't get it to power on, no matter what batteries I put in it... What do you think died, and with certain drivers, it must increase the output, depending on voltage input. I wasn't aware of this, through all my research of drivers, and creating an original post to further my research of drivers, that this was possible: see mentioned post here:

http://laserpointerforums.com/f44/dr...-mw-73216.html

Also, to honor my killed laser, check out these incredible beam shots!!!

LASER 1 (one 18650)



LASER 1 (two 18350's)



LASER 2 (measured at 1.2W)



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Old 04-19-2012, 04:19 AM #2
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Default Re: CSI This for me...Killed something (GREAT BEAM SHOTS)

You most likely exceeded the voltage which the driver could handle. In this
case you probably have a dead driver...

Depending on what happened after that, there is also the possibility that
you shot the diode with too much current and popped it.

That burning smell was your driver begging for mercy
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Old 04-19-2012, 04:47 AM #3
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Default Re: CSI This for me...Killed something (GREAT BEAM SHOTS)

Yeah it looks like that laser uses a switchmode driver, which would most likely be a Boost driver and you probably overvolted it using two Li-Ions. Why on earth would you put two cells in to it if it was built and sold as a one cell laser?
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Old 04-19-2012, 04:49 AM #4
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Default Re: CSI This for me...Killed something (GREAT BEAM SHOTS)

Quote:
Originally Posted by Sigurthr View Post
Yeah it looks like that laser uses a switchmode driver, which would most likely be a Boost driver and you probably overvolted it using two Li-Ions. Why on earth would you put two cells in to it if it was built and sold as a one cell laser?
I've seen many lasers advertised as taking one, or two batteries. I was ignorant on the fact that it could be damaging. I learned though, that is for sure.
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Old 04-19-2012, 06:25 AM #5
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Default Re: CSI This for me...Killed something (GREAT BEAM SHOTS)

Quote:
Originally Posted by dlipford370 View Post
I've seen many lasers advertised as taking one, or two batteries. I was ignorant on the fact that it could be damaging. I learned though, that is for sure.

Many lasers take 1, and many lasers take 2, not many lasers take
both. That is unless you are switching out a single Li-ion @3.6v for
2x 1.5v cells @ 3v

A 445 running on a single cell, as mentioned above, is most likely boost.
Even a driver like the flexdrive which is both boost and buck, still needs
a diode to drop the input voltage on 2 cell use.

As 'they' say, 'assumption is the mother of all...'

On a positive note, you can get the parts and fix it yourself
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Old 04-19-2012, 07:45 AM #6
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Default Re: CSI This for me...Killed something (GREAT BEAM SHOTS)

Its a boost driver with a Max input of around 5 volts you pushed it way to far and what I assume was into its linear region witch fried the boost ic
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Old 04-19-2012, 08:52 AM #7
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Default Re: CSI This for me...Killed something (GREAT BEAM SHOTS)

Quote:
Originally Posted by mattco2 View Post
Its a boost driver with a Max input of around 5 volts you pushed it way to far and what I assume was into its linear region witch fried the boost ic
A boost driver doesn't have a "linear region". These are totally two different technologies.
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Old 04-19-2012, 06:35 PM #8
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Default Re: CSI This for me...Killed something (GREAT BEAM SHOTS)

I understand why he would say that, but yes, it's wrong.

Basically the driver is overvolted. The components used in manufacturing of the IC used can only withstand so much voltage, and because they're small they can only handle a small amount... which is why it dies when you try to add too much.
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Old 04-19-2012, 09:42 PM #9
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Default Re: CSI This for me...Killed something (GREAT BEAM SHOTS)

Quote:
Originally Posted by JLSE View Post
Many lasers take 1, and many lasers take 2, not many lasers take
both. That is unless you are switching out a single Li-ion @3.6v for
2x 1.5v cells @ 3v
I can see where someone might read about Survival Lasers 445 and make that mistake though.

I like your attitude though, "learning experience." maybe he can replace the driver and get some sense of satisfaction from the experience.

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Old 04-20-2012, 04:45 AM #10
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Default Re: CSI This for me...Killed something (GREAT BEAM SHOTS)

Thanks for your help everyone. I'm going to have to opt for a new driver. What do you think is the best option for a driver? Anyone have one for sale?

Oh, and no comments on my beam shots! Don't they look beautiful?
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Old 04-22-2012, 04:56 AM #11
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Default Re: CSI This for me...Killed something (GREAT BEAM SHOTS)

by linear region i meant it just fell out of regulation stated trying to come the current somewhere constant. most ICs,however don't do this very well they just go fritzy and do all sorts of crazy sh*t
umm im working on a linear capable of 1.25 amps and there is the been boost and blitzbuck or the elusive flexdrive that only comes out when dr lava crawls out from his normal life and reflows then and then the micro boost and its just a lil smaller than the ben bost and about double the price but is adjustable
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Old 04-22-2012, 01:13 PM #12
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Default Re: CSI This for me...Killed something (GREAT BEAM SHOTS)

This may be a bad question, but why hasn't someone knocked off the flex drive?

I wouldn't suggest or ask this if it were regularly available? But since it is so unreliably available, it seems like a no brainer. Or at the very least, I'm surprised no one has knocked them off for personal, low volume use.


Maybe I'm looking at this wrong. I'm just curious though.
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Last edited by tsteele93; 04-22-2012 at 01:14 PM. Reason: Over the speed limit
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Old 04-22-2012, 02:21 PM #13
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Default Re: CSI This for me...Killed something (GREAT BEAM SHOTS)

Quote:
Originally Posted by tsteele93 View Post
This may be a bad question, but why hasn't someone knocked off the flex drive?

I wouldn't suggest or ask this if it were regularly available? But since it is so unreliably available, it seems like a no brainer. Or at the very least, I'm surprised no one has knocked them off for personal, low volume use.


Maybe I'm looking at this wrong. I'm just curious though.
I've wondered the same thing, it would be fairly simple to make a PCB and parts and produce them en masse. Perhaps there is a patent out there for it?
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