Building a 525nm Burning Green Laser Pointer & More about Lasers

[@Zenodilodon]

Hey guys, I finally figured out why the sound is off. The weekend before I did a laser show and enabled my laptop mic. I was wearing my recording head-set but the program picked up the laptop mic by default. The laptop mic will be checked and disabled for every video from now on :P Silly computers...

[@1000000volts]

When your diode flew across the room i laughed out loud , we've all been there . Nice shiny build .

[@hullinstruments]

Would love to see you do another green pointer build with one of the new crazy powerful green diodes. It’s crazy to think how cheap things have become. I was pricing out the parts to build a green pointer of at least one watt, and it’s barely over $100! And that’s if I buy the DTR module instead of doing stuff myself like normal. Scary to think that in a few more years will probably be seeing $25 green lasers coming from China that are well over 1 watt. Honestly that would be freaking awesome. Survival of the fittest I say! But I’m sure the government will clamp down on that once kids and cops start going blind everywhere because of pranksters. Also heard rumblings in the flashlight modern community of regulations possibly in the works for flashlights. Because they are now far surpassing the capability to blind people or cause permanent damage instantly. Wouldn’t believe some of the flashlights I’ve got my hands on and built recently. Really cheap stuff I’m talking under $50 to have the capability to absolutely destroy someone’s vision from a pretty great distance! Some of them can easily burn black plastic bags a few feet away. Scary stuff honestly. But a shit load of fun for DIY guys like us!

[@CG-cw3ps]

I recommend using sharp wire cutters to slowly, in a circular motion, chip away at the joint and then it'll just pop off. Delicate procedure but doesn't risk wire damage.

[@Zenodilodon]

in most cases the ball lens pulls off actually. I just didn't know that at the time. I also try to avoid using something with a loaded pressure just in case the material gives way unexpectedly, I have crushed a few cans that way in the past :(

[@hullinstruments]

Maybe I'm mistaken.. but I could have sworn there were one or two more laser pointer build videos... Specifically of the lasers which are shown as the preview photo for this video.

[@Zenodilodon]

I don't do many pointer build videos really. I want to kind of stay out of that for the most part because of general safety and so I don't get pelted with even more questions about people and their broken china pointers.

[@sekolum]

Best explanation that i watched

[@Zenodilodon]

Thanks! As I learn they'll get even better!

[@SDinnovation]

Your guide help a lot to build mine...

[@Zenodilodon]

So glad to hear that!

[@taylorheckers8327]

This is amazing!

[@Account.a827]

Hi sir, I have a question. If you know, please answer me, I have a 500mw 3.8mm 405nm diode laser from the module, should I give 6.5v 400mA input?

[@Zenodilodon]

For questions concerning current and voltage look at the manufacture's datasheet or try to compared the ratings of another laser diode with the same wavelength and power.

[@Account.a827]

@@Zenodilodon I asked the seller but everything didn't get the result I wanted, but now I know how. Thank you for your response.

[@tnegra1987]

Awesome video dude. very informative. I'm in the middle of making my own and i'm just curious to know what size resistor did you use on you're Mosfet? Keep em coming mate.

[@Zenodilodon]

Anything between 1-50kohm will work just fine for the pull down resistor.

[@domoetker3967]

233-455k is good

[@directdiode8507]

I love the barbar decanning G-Ball ^^, great ;)

[@Zenodilodon]

more like barbaric, When I first got the 520nm greens I could not remove the ball for the life of me. I wish I knew these came off so easy on the 525nm before going Conan on it.

[@synterr]

Is it possible to shine laser on DMD chip and make laser projector that way, without diffraction patterns?

[@Zenodilodon]

This is a problem I have been trying to overcome here in the shop for a while, I have tried many DMDs and they all diffract, I believe it's due to the pits between the DMD mirrors. The only way I can see it working with a clean laser beam is if the mirrors where much larger. If you ever come across a DMD that doesn't shimmer rainbows it would be the one to use, however I don't think one exists.

[@synterr]

@@Zenodilodon Thank you so much! :)

[@Zenodilodon]

@@synterr If I find out more I will let you know!

[@synterr]

@@Zenodilodon What if laser light will be not collimated, passed thru a lightpipe/lighttunnel? I heard that when you place transparent container inside ligtpipe (square mirror tube), filled with very diluted milk, then photons will be scattered a little bit. This patent with milk, especially helps with the "grainyness" of the laser light. But then, there is the question, why use laser instead of powerfull LED? What with modern DLP laser projectors? What do You think?

[@Zenodilodon]

@@synterr in laser projectors they do one of 2 things. Larger laser projectors will diffuse the laser light through a frosted glass plate, in the manor of the Casio slim they used the native blue laser light, a wheel that has phosphors that light up green when struck with blue laser light, and a red LED, these help cut down the properties of the native laser light. A thin piece of glass with an etched or sanded surface may help your application needs. Other laser projectors like the pocket/pico projectors use a MEMs micro mirror to steer the beam much like a CRT's electron beam assembly does line by line. Those are some options you can consider looking into, but in most cases LED will do a fair job as well.

[@JAKOB1977]

That look like Techhood's handwriting. 0:30 removing that balllens ain't as easy as some indicates, it will vary a lot from diode to the next if its simply down to screw into a wise and pull.

[@s.sradon9782]

if a module has one unspecified current rating it would be the lowest voltage rating so if I have a buck converter it's the output and if I have a boost converter it's the input.

[@Zenodilodon]

Yeah that tends to be the way it goes with the drivers. I wish there where more options for 3A+ single cell current regulated boosts.

[@cbfull]

The DPSS lasers, commonly 532nm, have far superior beam quality. They are definitely my favorite

[@Zenodilodon]

DPSS lasers are amongst my favorite too! They have excellent beam qualities.

[@bluethunder6801]

Woah they are great

[@sarbojitmukherjee4430]

Hey I liked your video . Can pls advise where I can but the laser diode and it's cost thanks in advance

[@Zenodilodon]

Here is a good place to buy Laser diodes from. sites.google.com/site/dtrlpf/

[@sarbojitmukherjee4430]

@@Zenodilodon thankyou sir. thanks a lot. It was very helpful :)

[@GLITCH_-.-]

Have you ever tried to make a laser with a very small beam diameter? Like 1 mm or less? Also how is your TEA Laser pointer coming along? Are you working on it?

[@Zenodilodon]

Hello, I have replied to that question on the other comment. micro flashlights video!

[@GLITCH_-.-]

@@Zenodilodon oops, no notification :)

[@voldy3565]

I have an idea: yellow lasers work similarly to green dpss lasers (crystals and stuff), so I was wondering, can you make a 589nm yellow laser with an IR diode and some crystals?

[@Zenodilodon]

Yellow lasers can be made a few ways, the most common set up is to have an 808nm pump laser that fluoresces a ND:YVO4 crystal just like in a green laser. Instead of being tuned to emit just 1064nm they are also tuned to emit around 1340-1350nm ( depending on the yellow desired ). Both of these larger IR wavelengths are sent into a second harmonic generation crystal which is often KTP just like in a green laser. However it needs to resonate both waves to create the right conditions/length to as to cause frequency summation between the 2 waves. If the resonator isn't tuned to do this you will either get 532nm green from the 1064nm or red 670nm from the 1340nm. These tight tolerances in the SGH resonator are why they are so expensive and difficult.

[@Dime_Bar]

Which lazer do you recommend for burning out the eyes of my enemies?

[@Zenodilodon]

Use a Cuban cigar, it's way classier.

[@sFeral]

Nice

[@ofirgaash]

Dude, maybe you can help me: I'm searching for green laser diodes like you're holding in the video but I can't find any cheap ones. I mean, a complete preapared and built laser pen costs around 3$ on ebay, and the diode itself only costs on ebay around 3.5$. I'm sure that somewhere someone sells it like 100 diodes for 7$, but I really cant find any. Thanks a lot!

[@Zenodilodon]

The 1 watt green laser diodes are quite pricey in contrast to many laser diodes. DTR's laser shop may have complete laser modules but otherwise you probably will not have much luck finding completed 1 watt green laser pointer for cheap. They usually are around $200 starting price. You can search on ebay for a laser diode itself NUGM03/ NDG7475.

[@ofirgaash]

@@Zenodilodon thank you!

[@ofirgaash]

@@Zenodilodon ok wow I'm searching for the cheapest diodes I can find. Even 5mw. The point is that I cant find any diode that is cheaper than 3$ while this is the price of full laser light. I want to buy around 100, so every dollar per each is important

[@Zenodilodon]

@@ofirgaash When you get into lasers you realize many other hobbies/occupations are relatively cheap and easy by comparison lol

[@EEthanGao]

Are you esd protected?

[@Zenodilodon]

For this nope. The unit is handheld and since I hold the device while working on it with my left hand, and install the ESD sensitive with my right I figured the chance of there being a large difference in charge potential between my hands to be relatively negated by my large fleshy resistor body. At work we are fancy with it. Not only do we have wrist strap stuff, but also ESD mats, and ion neutralizing fans. Fun stuff! How about you, are you ESD protected?

[@danksmokaz]

that diode tho!!!!

[@Zenodilodon]

Still kicking! It's quite robust :P I'm still surprised it survived.

[@poep1498]

Why does the box of your diode say 1v instead of 1 w? Or does it always use 1 amp?

[@Zenodilodon]

It's supposed to say 1w but I ran out of room to make a decent w lol

[@poep1498]

@@Zenodilodon oh yeah im askimg bc i saw a diode on aliexpress saying 2.7v and it didnt really show what its resistance was so i was curious on how i could know its output but when i saw this i thought maybe i was forgetting something lol

[@Zenodilodon]

Always use the current rating for setting a laser diode, it's about the only real thing to worry about when connecting up and calibrating a laser diode/driver combination.

[@garyfisherr4725]

Are they for sale

[@jonexyoutubechannel4423]

I love laser

[@Zenodilodon]

Me too buddy, me too.

[@jonexyoutubechannel4423]

Okey

[@jonexyoutubechannel4423]

I will subscribe

[@garyfisherr4725]

So what paint you out for sale in

[@Zenodilodon]

I do not sell laser pointers.

[@phonotical]

Neeeeeeed!

[@julieyoung2102]

Please tell me the names of the songs you use

[@Zenodilodon]

Songs are listed in the description under show more, and are listed at the end of every video.

[@FargothPL]

What laser driver did you used?

[@Zenodilodon]

I used a generic blue laser driver made for 2W blue laser diodes, easy to find on ebay but in this set up there was a cap on current so I did not get the full output only about 85% of it A better driver would be the Super X Drive and to use 2 batteries instead of one. sites.google.com/site/dtrslasershop/home/laser-drivers/super-x-drive-sxd-buck

[@danksmokaz]

oooo. dmd chips!!!!

[@Zenodilodon]

Got a DMD pocket projector here for a future tear-down. Hopefully i can get some microscope footage of a black and white video running on the DMD. That has to happen before I get to emotionally attached to it. Hopefully I'll get it back together.

[@cidofernandes6829]

Joia

[@garyfisherr4725]

That sucks I was hoping for some good paint

[@Zenodilodon]

Nothing stopping you from making them, its why this video exists. Good luck!

[@melangkoh4184]

DUDE....there is no laser driver for "blue lasers"....its only marketing to sell drivers for "specific colours"...a driver puts out current and voltage, it doesnt care about wavelenghs

[@Zenodilodon]

DUDE.... If some one who doesn't know about laser searches for drivers and doesn't know anything about DPPS vs direct diode they will end up in a pickle. This is because there is a common linear driver that isn't a boost mode, therefore would not work for running the Green laser diode do to lack of voltage. This is why I mentioned " Blue ". I thought it would help people avoid the LM358/D2882 driver that is often used to run the pump in a DPSS 532nm. Sadly because there is so much association in marketing with colors it's something to consider as this is what the average person is going to both try for key words and see by common association.

[@benlunn4006]

today on zuhluhduhluhuh

[@Zenodilodon]

HAHAHA, nailed it!

[@benlunn4006]

@@Zenodilodon I'm glad you didn't take offence to this 😎 I meant no harm. I've only recently found you channel and I'm very impressed. Just watched your OPSL build. Now I'm watching the video you linked us too for building an plasma pen 😎 keep it up dude, really enjoying your videos 😎

[@benlunn4006]

Your *

[@Zenodilodon]

@@benlunn4006 My channel name is difficult to say, I screw it up quite often, Big Clive managed " Zenodulabdah " when he tried to read it, others have asked how I manage to pronounce it. I think it's great fun :P

[@benlunn4006]

@@Zenodilodon brilliant 😅😅😅

[@TheMCCraftingTable]

Cool build! Also, I know sanxion7's Gargoyle from a rhythm game. Hell of a song.

[@TheMCCraftingTable]

Also, do you put the dichroic filter with the coating facing inside or outside?

[@Zenodilodon]

Sanxion7 is amazing, I met him once and bought him a beer. One of the few composers of music I really admire and he is from my state! I think you may of found his music the same way I did, the game was Stepmania that I heard his songs on.

[@Zenodilodon]

@@TheMCCraftingTable Always with the coating on the inside so you can't damage it if you clean the front.

[@TheMCCraftingTable]

@@Zenodilodon Thanks for your reply. Also, yes, Sanxion7 is on Stepmania, and on the arcade version too (called Pump it Up)

[@garyfisherr4725]

Are they for sale

[@Zenodilodon]

All laser pointers that I make are for demonstrations of the laser diodes if customers want to see what can be put into there show laser projector in a repair or rebuild situation. It's kind of like my paint samples selection.