Hello all, i'm trying to build a laser harp as per these instructions Frameless Laser Harp but i'm pretty new to lasers so i'm having some trouble finding a suitable one. Ideally i'd be able to see it in a lighted room and it wouldn't burn my skin if I touched it so I was thinking a 50mw green laser. I've looked at some of the sites recommended on these forums but all of them are either too expensive for me or would take too long to arrive (seeing as how it would be hard to get it here from China this year what with all the Christmas mail), so i'm hoping someone can direct me to a reliable source that has them for around 30-40 bucks including shipping and can still get it to me within the next couple weeks (I'm in the US by the way), thanks in advance.
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ArcticMyst Security by Avery
Laser Harp laser
- Thread starter albuser
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Welcome to LPF! 
May I suggest laserbtb, real good quality and their 50mW 532nm is priced very well.
BTW: Add your location on your profile, it will help the other members out
May I suggest laserbtb, real good quality and their 50mW 532nm is priced very well.
BTW: Add your location on your profile, it will help the other members out
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Mhm you are correct!
Plus those are eBay style pen lasers, none of them have any IR filters whatsoever:beer:
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No problem bud, if you ever have anymore questions just ask on the forums :beer:
ARG
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Then keep on hoping. I don't think such a beast exists for that cheap. Not from the USA any rate. You may be able to find one used, but other than that I think something like this is the closest you'll find.
532nm 50mw TTL power adj. laser 90-240 VAC, AixiZ
$55, shipping not included.
Edit: A handheld wont work for this project, you need something with TTL or analogue modulation.
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Ahhh alright, thanks for helping him out ARG
Thought a handheld would work, guess not haha.
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The "style" of a laser means nothing. Have you seen optotronics pen lasers?
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It actually does, most of those lasers are common mass produced from China. I know Optotronics has the same host but their diodes on "Optotronics lasers" are not the same as the one's on the "eBay" lasers.
Plus for the price they were being sold Im sure it was just as bad as quality as the units sold on eBay.
ARG
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To hook up a laser to an Arduino it needs to have a driver that can be turned off with logic signals (0V or 5V).
Regular handheld laser drivers typically doesn't have the response time needed to be pulsed, especially with DPSS lasers.
A TLL/Analogue laser can be wired up to an Arduino by just using one of the I/O pins to turn it on and off at high speeds.
I don't think the laser needs to turn on and off at high speeds, the idea is the beam is continuous but when you place your hand over it the photoresistor will read it and tell the processor at what stage of the stepper motor the signal was read, the stepper motor is creating the split beam effect not the laser itself
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So you would like a constant on laser? Not a momentary push/switch.
And albuser, from the first post. I can guarantee you most likely won't find any laser company in the US/Canada that will currently ship a 50mW to a customer in the US. China is pretty much your only choice
(unless you can find a member to make one for you)
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That would be nice but I figure if its easier to get a pushbutton one i'll just tape the button down
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Well the tape method may not be the best way, most of the time the output power will vary slightly.
Hum...I can't think of any 50mW LAB units but if anything pops up I will make a post.
EDIT: May be worth your while to ask around in the B/S/T section of LPF, you never know if anyone might be willing to sell one
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