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ArcticMyst Security by Avery

300mW 808nm Laser diodes on eBay for $4.49 free shipping!






lasersbee

lasersbee

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Good find... thanks for sharing...:)

The operating voltage is in the description...
I've asked the seller for a Data Sheet for his NEW LDs..


Jerry
 
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.3lite

.3lite

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Shipping to: N. and S. America, Europe, Australia
Excludes: Africa, Asia, Central America and Caribbean, Europe, ...

Lol? Maybe it was meant to be "includes" ;d
 
lasersbee

lasersbee

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.3lite said:
Shipping to: N. and S. America, Europe, Australia
Excludes: Africa, Asia, Central America and Caribbean, Europe, ...

Lol? Maybe it was meant to be "includes" ;d
Click to expand...

Some eBay sellers will bend the rules if you ask them....:rolleyes:

Jerry
 
lasersbee

lasersbee

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$5.00 for a 300mW laser...(if it is true) He!! yes...

Remember...
1) you will not see the Beam (But the DANGER is there)
2) you WILL NEED Laser Safety Goggles for that wavelength


Jerry
 
Xplorer877

Xplorer877

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Jex said:
But i have no idea on how to drive them
Click to expand...

Do you know about the LM317 chip?

LM317 / LM338 / LM350 Voltage and Current Regulator Calculators

There are two ways to use them, as current regulators or voltage regulators. Seeing as we don't know the current you can build it to regulate voltage and set it to 2.2v. Supply it with at least 5.5v.

That's about the best performance for the price driver you can get. I use LM317s all the time.

-Tony
 
Morgan

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Check out this recent thread -

http://laserpointerforums.com/f51/ebay-items-newbe-woes-52022.html -

Similar product bought recently; is it the same guy? The seller in the thread above is a member here so maybe a better contact? He answers the thread on page two, (Laser66 I think), but there's other info in the thread too that may be relevant.

Driving any laser diode follows the same principles, it's basically just forward voltage, thresholds and safe working currents that vary. IIRC, forward voltage of an 808nm is around 1.8V and 300mW will be somewhere around 4-500mA but check this out to be sure as I can't always rely on my memory and have to write most things down these days! :crackup:

Any of the common drivers here will safely power these, it's just as to how useful 808nm is to you and can you safely work with it?!!!

M
:)
 
styropyro

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I looked on eBay for snoctony's listings to see what the recommended currents for their laser diodes are. For their 200mW 808nm diode, current was 290mA, and for their 500mW the current was 650mA. So you could try to pick a current in there and call it a day, if you screw something up it's only $4.449. :D
 
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J

Jex

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styropyro said:
and for their 500mW the current was 650nm.
Click to expand...

Lol ive always wanted to set a wavelength as a current but unfortunately thats not possible.

So would you recommend around 400mA for this diode, i have a few dilda drivers lying around that drive at 320mA so i suppose they would be suitable but what about the voltage?

Thanks for the advice Morgan and styropyro

EDIT: Ive just noticed that he wont ship to the UK but Ive contacted him and awaiting a reply
 
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Morgan

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Try the guy in the linked thread a few posts back. The buyer there was a UKer and got his diodes. I don't know what the price was though of course.

I would say 400mA should be okay but you takes your chance. I have some 5.6mm IR or NIR diodes here that are unknown wavelength and was told they are 500mW output but this was probably exaggerated as they will output a maximum of 350mW at around 500nm, (did you see what I did there!).

After 350mW, if you increase the mA the power diminishes and just turns up the heat. This is why I would say 400mA should be okay but I have no clue as to how long they will last at that current.

What were the drivers driving? If they are linear drivers for reds then the output should be pretty close but again, without knowing exactly what the drivers are then it's a gamble. Can you take some pics of them? I might be no help here but others may be able to recognise them. Forward voltage for reds is a little higher than for IRs in general. 2.2-2.5V as opposed to ~1.8V.

M
:)
 
J

Jex

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Morgan said:
(did you see what I did there!).
Click to expand...

Indeed i did lol, ive found a seller that ships to the uk and ordered one.

But if i want to drive this at 320 mA is it as simple as pressing it into an old dilda host and soldering the driver on, will it work with the 2xCR2 host?
 
lasersbee

lasersbee

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Jex said:
Lol ive always wanted to set a wavelength as a current but unfortunately thats not possible.

So would you recommend around 400mA for this diode, i have a few dilda drivers lying around that drive at 320mA so i suppose they would be suitable but what about the voltage?

Thanks for the advice Morgan and styropyro

EDIT: Ive just noticed that he wont ship to the UK but Ive contacted him and awaiting a reply
Click to expand...

I really hate to tell you this.... (if you are serious)...
But you don't seem to have a clue as to the meaning
of Wavelength or Current...
The two are NOT related in the least...
I would suggest an intensive read session on the Forum...

The Red 650Mw Dilda is set up for <200mW to drive the 650nm
LD it comes with... The usal output with 2pc 3.0 Volt batteties
is anound 160mW...

Jerry
 
Morgan

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^I'd be optimistic but it does depend on a few things. Some photos will really help here. The proposed diode housing, the driver, and some info on what the driver was powering before if you have that.

The more info we have, the more we may be able to help.

M
:)
 
Morgan

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Sorry for double post. I don't know how to edit a post to insert a quote...


lasersbee said:
I really hate to tell you this.... (if you are serious)...
But you don't seem to have a clue as to the meaning
of Wavelength or Current...
The two are NOT related in the least...
I would suggest an intensive read session on the Forum...

The Red 650Mw Dilda is set up for <200mW to drive the 650nm
LD it comes with... The usal output with 2pc 3.0 Volt batteties
is anound 160mW...

Jerry
Click to expand...

Check out post #10 Jerry, the guy says, [paraphrase], for 500mW the current was 650nm. So Jex was just commenting on that. I'm pretty sure he does know the difference between mA and mW after a few PMs. No biggie.

Good info on the Dilda though. I shall log that away in the memory banks, (or probably just writing it down would be better these days :undecided: ).

M
:)
 
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