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FrozenGate by Avery

Flat Plastic Diodes for Testing

the diode i had was from an LG DVD drive .. cant remember the the exact type but the diode had 4 pins (red, IR, Photodiode?? and Kathode) havent tested it jet .. might do it next week
 





Larry, true that, but who runs them at 100ma?
I am doing 360-370ma for the IR at 2.2v and 400-420ma at roughly 3v for my reds.
Reds light matches at 20 feet and they keep working even after 5 minute duty cycles.

The IR I am using on a cnc machine for light engraving and etching, and it completes 7-8 minutes duty cycles but it gets quite warm.... almost hot.
 
Flaminpyro said:
Larry I got one of them flat suckers on it's way to ya, have fun with it !
Click to expand...

I received your diode.

It has 3 pins and an IR diode also in the package.

The Red laser does seem to have good power.
I will test it when I get a 4-pin Red to compare it to.

I still need a 4-pin Red only (like the photo in post #12 above),
if anybody has one from a 22-24X DVD burner.

I will trade or purchase.

Thanks;

LarryDFW
 
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Found a 4-wire Red only diode today.
Some photos with the top cover off:
4wred.jpg

4wred2.jpg

Heatsink is common with negative lead.
It came from a 2008 DVD burner.

LarryDFW
 
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Received several Flat Reds from Daguin & Crazy Jay.

Thanks Guys.

Picked up another Red can to test today.

I still don't have the 4-wire Plastic Red that I am still looking to test against.

LarryDFW
 
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Crazy Jay;

The one I got from you is a three-pin flat plastic Red LD.

They seem to have good power and a fairly good beam.

I do think the elusive 4-pin Red is higher power.

I think it is used in some Samsung 20/22X DVD burners and in some LG 22X DVD burners.

LarryDFW
 
LarryDFW said:
Crazy Jay;

The one I got from you is a three-pin flat plastic Red LD.

They seem to have good power and a fairly good beam.

I do think the elusive 4-pin Red is higher power.

I think it is used in some Samsung 20/22X DVD burners and in some LG 22X DVD burners.

LarryDFW
Click to expand...

Is it the best diode out there for red?
 
Oh, they are powerful...
this is one of the flat diodes doing some purposeful burning
 

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Lux;

Is that the Red or the IR ?

I found a new 16X Red laser type yesterday:
red12f.jpg
red12.jpg

It only has 12 pins to figure out (marked in photo).
It was from an AOpen 16X drive.
It had a threshold of 50ma and very good power.
Unfortunately, it died during the power testing,
before I got an accurate power reading.

Edit: It is actually a Sharp laser diode.

LarryDFW
 
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Hi Larry,
it is the red one, I am running it at 500ma, and the engraving work you see there, took about 1 hour. Duty cycle is like a minute on and a second off, and goes up to 5 minutes on and 1-2 second off, so it's quasi-continuous.

the light emitted is different, it seems to diverge more then the locs, so it's hard to get all the light to go through the lens, all in all, I'd say it's a bit less powerful then a LOC but it's definitely sturdier, more resistent to esd, and heat.

The Laser head gets really hot and it as a cnc machined 15mm diameter by 15mm hight heatsink...

so far it hasn't died, and it's done at least 5 hours of heavy engraving.

One thing I noticed, it likes to work at a slightly higher voltage then the loc.
 
This came out of an LG GH22NS30 22x Super Multi DVD Rewriter.

What's the pin-out? Also, what kind of mount/module do these work with, or should it be left in the heatsink?

I powered the 3-pin with the driver shown in pic and got a nice bright red, bright enough to see the .25" x .25" square beam emitted from the other side of the sled. It threw a nice 'reticle'-like image, as well as a weird multi lined image shown in last pic.

I'm assuming the 3-pin diode wires/mounts/operates like a regular one...true?
 

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LarryDFW said:
This is a photo of the actual diode I am looking to test:
flatred.jpg


LarryDFW
Click to expand...
I just found a diode like this few days ago, but it was IR from CD player, so ti has only few mW
and unfortunately, I destroyed it :(
 
Last edited:
5v1i5v0;
This came out of an LG GH22NS30 22x Super Multi DVD Rewriter.

What's the pin-out? Also, what kind of mount/module do these work with, or should it be left in the heatsink?

I powered the 3-pin with the driver shown in pic and got a nice bright red, bright enough to see the .25" x .25" square beam emitted from the other side of the sled. It threw a nice 'reticle'-like image, as well as a weird multi lined image shown in last pic.

I'm assuming the 3-pin diode wires/mounts/operates like a regular one...true?
Click to expand...

Thanks for posting the drive model that had the LD.

The pinout for the 4-Pin 20X Red I have is:
Heatsink down from pin side - Pin on right is (+)
Heatsink & 2 Pins in middle are (-)

The 3-Pin is normal for IR.

There is no easy way of mounting these flat diodes.

I will purchase it if you want to sell it (or trade for lens or Aixiz modules)

LarryDFW
 
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