Violet laser modules $27 CLOSED

rubberband · Oct 25, 2007

Re: Group Buy #2 Violet laser modules $27 target

if i sell my dorcy i am deffenatly in for one

this is sooooo sweet i want a blu-ray laser soo much.
thanks for doing this man

Mitch

drlava · Oct 25, 2007

Re: Group Buy #2 Violet laser modules $27 target

BlueFusion said:
[quote author=drlava link=1193205551/0#11 date=1193265420][quote author=BlueFusion link=1193205551/0#9 date=1193262832]Hey drlava, they are $14 each (but i emailed them with a RFQ for 30 to see if we could get the price down) so if i buy two thats already over the $25...

Hmm, that would be fine, but looking here:
http://dkc3.digikey.com/PDF/T073/P2298.pdf
top-right it looks like it's not compatible with the common cathode layout of the laser here:
http://www.fineartradiography.com/hobbies/lasers/blu-ray/index.html

Is there a mistake?
[/quote]

There is a whole thread about using this driver for blurays. Try this post.

Daedal said:
With the testing that I have done already... I can report as follows...

1. The controller is GO!
2. I noticed a rather quick ramp up in power when starting the diode.
3. IT IS SMALL!!! AND HARD TO SOLDER TO...
4. The little pot on there is extremely sensitive...
5. Very nice control and doesn't heat up as much as I suspected.
6. I have ramped it up to 160mA, didn't need to go any further, and as such that is where I stopped. It seems to warm up at such high drive power though... :-/
7. I like it, and trust it with driving a BluRay diode, and that is what I got it for

GL;
DDL

[/quote]

I saw that thread and noticed this post:

Ok, tested it on a BluRay diode... This is pretty much useless! IT powers the diode up to about 10mW and then stops... I managed to get it up to 18.5mW MAX, after which it did the exact same thing Sad

Bummer;
DDL

but he didn't say anything much after that. to me, 10mW-18.5mW is very useful, so hopefully he will clarify. Also, SenKat never said anything about it in that thread. Hopefully he will chime in, too.

SenKat · Oct 25, 2007

Re: Group Buy #2 Violet laser modules $27 target

Here is SenKat's chime : I don't care for that driver, as a 7805 Voltage regulator works perfectly for this application - and they are a LOT less expensive - with regulated output, and a current limiting resistor, you will be good to go !

[ /end chime ] hehehehe

drlava · Oct 25, 2007

Re: Group Buy #2 Violet laser modules $27 target

thanks, Sen. A regulator like you describe will be included in the group buy driver kit (if selected) It should be more robust, and it's cheaper than the digikey one, too.

Hemlock_Mike · Oct 25, 2007

Re: Group Buy #2 Violet laser modules $27 target

Perhaps a little caution here. I think I've seen posts of using the 7805 with a 1 ohm resistor. That resistor may be a little low.
My Blu runs at 50 mA with a junction voltage of 4.86 volts. My math indicates a need for a 2.8 ohm series resistor.

Mike

Gazoo · Oct 25, 2007

Re: Group Buy #2 Violet laser modules $27 target

I will be using a 78L05A. This is the 100ma TO-92 case version and it has a 1.7 volt drop out voltage. I was going to use it as a current regulator, but Daedal confirmed my testing of it as a current regulator and it is a no go. But it works very well as a voltage regulator.

You can get them here for 10 cents a piece and he has many other parts for cheap:

http://stores.ebay.com/Techno-Star_Voltage-Regulators_W0QQcolZ4QQdirZ1QQfsubZ8QQftidZ2QQtZkm

I also ordered some 50 ohm precision trim pots from him for 99 cents a piece!

drlava · Oct 26, 2007

Re: Group Buy #2 Violet laser modules $27 target

Added participant list. Time for payments to start coming in.

justin07 · Oct 26, 2007

Re: Group Buy #2 Violet laser modules $27 target

what are the specs on the lm317

Hemlock_Mike · Oct 26, 2007

Re: Group Buy #2 Violet laser modules $27 target

Justin --
That info is all over this forum. Also, go to google and type in LM 317.
Use a search here.

Mike

drlava · Oct 26, 2007

Re: Group Buy #2 Violet laser modules $27 target

justin07 said:
what are the specs on the lm317

The LM317 circuit will have slow-start capacitor, current regulator with to-220 package, heat sink, two current ranges for adjustment: current adjustable from 20-80mA for this diode, to about 500mA for other diodes. With an included resistor change the current range can be changed. Will come with a protoboard, resistors, pot, and instructions.

Bionic-Badger · Oct 26, 2007

Re: Group Buy #2 Violet laser modules $27 target

Can you please post a picture of what the lens kit contains? I might want one for other laser diodes too. Thanks.

drlava · Oct 26, 2007

Re: Group Buy #2 Violet laser modules $27 target

Bionic-Badger said:
Can you please post a picture of what the lens kit contains? I might want one for other laser diodes too. Thanks.

I updated the original post with a picture.

Bionic-Badger · Oct 26, 2007

Re: Group Buy #2 Violet laser modules $27 target

Ah, very nice. This sure beats going through Axiz. Google payment on its way.

LazyLaserer · Oct 26, 2007

Re: Group Buy #2 Violet laser modules $27 target

just paid for an order 1 ld 1 lens & 1 driver. any estimate on how long before i get them?

drlava · Oct 26, 2007

Re: Group Buy #2 Violet laser modules $27 target

we are quickly approaching the 22 paid-for mark, so they will be ordered early next week.

adgmeijin · Oct 27, 2007

Re: Group Buy #2 Violet laser modules $27 target

Hey did you sell a blu-ray diode? how much is that, i will use it for my project, how can i pay for that item, thanks.

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