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Old 02-22-2012, 06:15 PM #17
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Default Re: DIY RGB questions.

Quote:
Originally Posted by ElektroFreak View Post
Galvos are slightly more advanced than spirograph mirrors, true galvos are capable of full images and animations whereas a spirograph uses mirrors mounted to rotating motors, each being tilted slightly so that as they rotate they project a circle. Combining multiple motor/mirror assemblies allows for complex spiral patterns.

The laser drivers need to be capable of being modulated. Most hobbyists use the FlexMod from drlava (buy it through Flaminpyro here though as drlava isn't really up for business at this time). When you build your modules, you would use Flexmods instead of the usual Flexdrive or DDL (LM317) drivers. Then you can apply a modulation signal to each laser so as to produce different colors when combining them.
Ah, and how much would those set me back?

And how do you send this signal? Sorry for the noobness, projectors are completely foreign to me as far as their guts are concerned.


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405nm 500mW
442nm 15mW Melles Griot HeCd
445nm 1W
455nm 100mW LaserBTB
457nm Tunable OMNI 532
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467nm 1.8W NDB7675
472nm Tunable Omni 532
473nm 2x 100mW Melles Griot lab heads w/ PSUs
476nm Tunable OMNI 532
488nm Single line 35mW
496nm Tunable OMNI 532
502nm Tunable OMNI 532
514nm Tunable OMNI 532
520nm 40mW MSV2
532nm Various pointers
543nm GreeNe 2mW
568nm ~20mW ArKr whitelight line
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594nm Rigel-6; 4.75mW + <1mW
604nm 2x <1mW multiline
609nm Ne Penning mixture Ar line from REO 612nm
612nm HeNe 1mW ML 4 line; Raman 6 line
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HeNe/gas reference thread
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Old 02-22-2012, 06:18 PM #18
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Default Re: DIY RGB questions.

If you want to modulate your lasers without a $40 FlexMod (that is $40 per color channel), consider using this circuit. I use it all the time for diode testing. You can hook it to a correction amp circuit like those in the sticky of this forum.

For signal inputs, consider a sound card DAC (see sticky in forum) or a laser DAC (purchased elsewhere for more).
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Old 02-22-2012, 06:44 PM #19
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Default Re: DIY RGB questions.

That brings me to a point I want to make. Bloompyle, while in your mind it sounds simpler to build a simple whitelight beam device and then control the colors with external signals, in reality it will be easier for you to build a true laser projector simply because the instructions, hardware and software are all readily available and easily found. By the time you build a sound card DAC or buy a commercial DAC you'll already be pretty invested, either monetarily or in terms of effort or both. Using a DAC of any sort to control a spirograph or something like that is overkill. A function generator or frequency synthesizer would be better, but you'd likely have to buy or build one of those too if you don't already have one.
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Old 02-22-2012, 07:07 PM #20
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Default Re: DIY RGB questions.

OSRAM 450nm 50-80mw Blue Laser Diodes/Single Mode/PL-450 | eBay

Offer them ~$45. Keep an eye out on these, they go cheaper sometimes.
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Old 02-22-2012, 07:34 PM #21
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Default Re: DIY RGB questions.

Quote:
Originally Posted by Tech_Junkie View Post
OSRAM 450nm 50-80mw Blue Laser Diodes/Single Mode/PL-450 | eBay

Offer them ~$45. Keep an eye out on these, they go cheaper sometimes.
The issue of it being a 3.8mm diode still comes into play, how readily available are modules in this size?


Quote:
Originally Posted by ElektroFreak View Post
That brings me to a point I want to make. Bloompyle, while in your mind it sounds simpler to build a simple whitelight beam device and then control the colors with external signals, in reality it will be easier for you to build a true laser projector simply because the instructions, hardware and software are all readily available and easily found. By the time you build a sound card DAC or buy a commercial DAC you'll already be pretty invested, either monetarily or in terms of effort or both. Using a DAC of any sort to control a spirograph or something like that is overkill. A function generator or frequency synthesizer would be better, but you'd likely have to buy or build one of those too if you don't already have one.
I understand, and at the moment, I'm just building a basic RGB "combiner" ? Just something that combines the colors using the lenses from O-Like and can make yellow, cyan, magenta, and white, and will look really cool. In all honesty that is my cool, an awesome laser project that I can look at and say "yeah, that's awesome, and I made that." Know what I mean? I'm not even going to have basic mirrors, just a beam coming straight out and chillin. real basic stuff, well as far as RGB's go, it's all new and complex for me haha

EDIT: I don't want this to sound like I'm disregarding your help or info, I fully understand, and I guarantee you that what you've told me will be fully researched, and there will be plenty late nights reading about this, but at the moment I'm starting small, and with something I understand for the most part. I'm still someone who's NEVER combined beams or lasers, so this is still a whole new thing for me, and I'm still gaining info that will help me understand lasers and RGB units as a whole. I just need a good place to start and I feel comfortable with this being it. Thank you so much, all of you, for the help, I've added this to a bookmark so I have terms to look up, and a little bank of knowledge to start at, and refer to. Thanks a ton yall!
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442nm 15mW Melles Griot HeCd
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455nm 100mW LaserBTB
457nm Tunable OMNI 532
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467nm 1.8W NDB7675
472nm Tunable Omni 532
473nm 2x 100mW Melles Griot lab heads w/ PSUs
476nm Tunable OMNI 532
488nm Single line 35mW
496nm Tunable OMNI 532
502nm Tunable OMNI 532
514nm Tunable OMNI 532
520nm 40mW MSV2
532nm Various pointers
543nm GreeNe 2mW
568nm ~20mW ArKr whitelight line
589nm 126mW PGL-III-C
594nm Rigel-6; 4.75mW + <1mW
604nm 2x <1mW multiline
609nm Ne Penning mixture Ar line from REO 612nm
612nm HeNe 1mW ML 4 line; Raman 6 line
629nm <1mW Raman 6 line
633nm 1-4mw red HeNe
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638nm 20mW single mode
640nm Raman 6 line
647nm ~10mW ArKr whitelight Kr line
650nm Raman 6 line
658nm LPC-826
685nm 20mW
808nm Modded NewWish pen


HeNe/gas reference thread

Last edited by bloompyle; 02-22-2012 at 07:41 PM.
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Old 02-22-2012, 08:18 PM #22
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Default Re: DIY RGB questions.

Quote:
Originally Posted by bloompyle View Post
The issue of it being a 3.8mm diode still comes into play, how readily available are modules in this size?
The search engine is still your friend.

Copper 3.8mm diode mount for 12 X 30mm laser module blank | eBay
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Old 02-22-2012, 08:23 PM #23
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Default Re: DIY RGB questions.

Quote:
Originally Posted by Tech_Junkie View Post
Well woulda look at that. Thank you sir
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405nm 500mW
442nm 15mW Melles Griot HeCd
445nm 1W
455nm 100mW LaserBTB
457nm Tunable OMNI 532
465nm Tunable OMNI 532
467nm 1.8W NDB7675
472nm Tunable Omni 532
473nm 2x 100mW Melles Griot lab heads w/ PSUs
476nm Tunable OMNI 532
488nm Single line 35mW
496nm Tunable OMNI 532
502nm Tunable OMNI 532
514nm Tunable OMNI 532
520nm 40mW MSV2
532nm Various pointers
543nm GreeNe 2mW
568nm ~20mW ArKr whitelight line
589nm 126mW PGL-III-C
594nm Rigel-6; 4.75mW + <1mW
604nm 2x <1mW multiline
609nm Ne Penning mixture Ar line from REO 612nm
612nm HeNe 1mW ML 4 line; Raman 6 line
629nm <1mW Raman 6 line
633nm 1-4mw red HeNe
635nm Raman 6 line
638nm 20mW single mode
640nm Raman 6 line
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Old 02-22-2012, 08:38 PM #24
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Default Re: DIY RGB questions.

I built my first projector for ~600.

3 Flexmods, 20k galvo's, USB soundcard, drlava's correction amp and a ********* license.

I made some dichro mounts, and got the dichro's from a video projector.
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Old 02-22-2012, 08:47 PM #25
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Default Re: DIY RGB questions.

Quote:
Originally Posted by Solonar View Post
I built my first projector for ~600.

3 Flexmods, 20k galvo's, USB soundcard, drlava's correction amp and a ********* license.

I made some dichro mounts, and got the dichro's from a video projector.
$600 is 3 of my paychecks I'm working with what I have, I'll be getting 2 mohgasms preset, those are like $12 each, so both combined is still less than a flexdrive. A 100mW module from O-Like if they get them again (it's only showing 50, and 200) and a 300mW 635 from them, and a 455 from them, and a 2 pack of their RGB mirrors, and a couple lenses for fun. =]
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405nm 500mW
442nm 15mW Melles Griot HeCd
445nm 1W
455nm 100mW LaserBTB
457nm Tunable OMNI 532
465nm Tunable OMNI 532
467nm 1.8W NDB7675
472nm Tunable Omni 532
473nm 2x 100mW Melles Griot lab heads w/ PSUs
476nm Tunable OMNI 532
488nm Single line 35mW
496nm Tunable OMNI 532
502nm Tunable OMNI 532
514nm Tunable OMNI 532
520nm 40mW MSV2
532nm Various pointers
543nm GreeNe 2mW
568nm ~20mW ArKr whitelight line
589nm 126mW PGL-III-C
594nm Rigel-6; 4.75mW + <1mW
604nm 2x <1mW multiline
609nm Ne Penning mixture Ar line from REO 612nm
612nm HeNe 1mW ML 4 line; Raman 6 line
629nm <1mW Raman 6 line
633nm 1-4mw red HeNe
635nm Raman 6 line
638nm 20mW single mode
640nm Raman 6 line
647nm ~10mW ArKr whitelight Kr line
650nm Raman 6 line
658nm LPC-826
685nm 20mW
808nm Modded NewWish pen


HeNe/gas reference thread
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Old 02-22-2012, 10:45 PM #26
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Default Re: DIY RGB questions.

@bloompyle i have an 85mw green mod i'll sell ya for $15 shipped. gotta recheck the power. posted this module in deals/discounts here : 100mw 532nm modules

i'm interested in doing this myself. pm me

not sure what olike sells dicros for but drt sells casheeo optics cheap ($12) that has these and LOTSA other optics
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Old 02-22-2012, 11:04 PM #27
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Default Re: DIY RGB questions.

Quote:
Originally Posted by cheech226 View Post
@bloompyle i have an 85mw green mod i'll sell ya for $15 shipped. gotta recheck the power. posted this module in deals/discounts here : 100mw 532nm modules

i'm interested in doing this myself. pm me

not sure what olike sells dicros for but drt sells casheeo optics cheap ($12) that has these and LOTSA other optics
PM incoming
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405nm 500mW
442nm 15mW Melles Griot HeCd
445nm 1W
455nm 100mW LaserBTB
457nm Tunable OMNI 532
465nm Tunable OMNI 532
467nm 1.8W NDB7675
472nm Tunable Omni 532
473nm 2x 100mW Melles Griot lab heads w/ PSUs
476nm Tunable OMNI 532
488nm Single line 35mW
496nm Tunable OMNI 532
502nm Tunable OMNI 532
514nm Tunable OMNI 532
520nm 40mW MSV2
532nm Various pointers
543nm GreeNe 2mW
568nm ~20mW ArKr whitelight line
589nm 126mW PGL-III-C
594nm Rigel-6; 4.75mW + <1mW
604nm 2x <1mW multiline
609nm Ne Penning mixture Ar line from REO 612nm
612nm HeNe 1mW ML 4 line; Raman 6 line
629nm <1mW Raman 6 line
633nm 1-4mw red HeNe
635nm Raman 6 line
638nm 20mW single mode
640nm Raman 6 line
647nm ~10mW ArKr whitelight Kr line
650nm Raman 6 line
658nm LPC-826
685nm 20mW
808nm Modded NewWish pen


HeNe/gas reference thread

Last edited by bloompyle; 02-22-2012 at 11:04 PM.
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Old 02-23-2012, 12:11 AM #28
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Default Re: DIY RGB questions.

Mohgasm drivers can't be modulated to get those effects, they are designed for constant power only.

Myself and a few friends are currently working on a new analog driver that'll have similar specs than the flexmod, but a LOT cheaper.
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Old 02-23-2012, 01:39 AM #29
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Default Re: DIY RGB questions.

If you just want to play around with a white dot check my work in progress...

My ghetto white laser (RGV)
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Old 02-23-2012, 02:57 AM #30
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Default Re: DIY RGB questions.

Quote:
Originally Posted by Things View Post
Mohgasm drivers can't be modulated to get those effects, they are designed for constant power only.

Myself and a few friends are currently working on a new analog driver that'll have similar specs than the flexmod, but a LOT cheaper.
I have no need for modulation, again, just using this RGB unit to combine 3 colors, that's all =] Thank you for the tip though =]
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Old 02-23-2012, 03:29 AM #31
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Default Re: DIY RGB questions.

The reason for modulation referenced above was so you can fine tune your individual color outputs to attain the shade of white you desired. Picking fixed values still works but leaves you only 7 color possibilities.
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Old 02-23-2012, 03:46 AM #32
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Default Re: DIY RGB questions.

Quote:
Originally Posted by Sigurthr View Post
The reason for modulation referenced above was so you can fine tune your individual color outputs to attain the shade of white you desired. Picking fixed values still works but leaves you only 7 color possibilities.
So what you're saying is that Mohgasms don't use the standard pot? It only comes in those current choices he has available on his site?
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