Recent content by ar1999

yes, at this time I am using 2 steps per beam(one + one) for a total of 9 beams. Speed is working ok for now but maybe I will try to update the laser harp project with a smaller stepper motor in the future. (if I can dinf them at a reasonable price)

Yes, I heard about it, but for now I need speed first, and I think this would make it slower... I would love to do double step, not half step... :) Is there a way to do that? Yes, it is very strange! It's from a Brazilian company. But I guess I could do this easier with 5 or 6 wire step...

Here is a nice video guide about how to figure your stepper motor (wires) - link and video below. Eastern Geek: How To Identify Stepper Motor Lead Wires – The Fool Proof Way fTtwWJZlGt4&feature=player_detailpage Also a high speed step motor video demo (claims to be at 4000rpm). Link and...

I have tryed one of those stepper motors (5V 4-Phase Stepper Motor + ULN2003 Motor Drive Board | eBay) and they are way too slow... like a toy... it will not work for a laser harp. You need the fastest nema17 you can find. It doesnt need to be strong to lift anything. I used a Wine Cork...

Where would you recommend to buy a laser like this at a reasonable price?

Ok I see what you mean. A $5 webcam would be great. Maybe in the future I can make an upgrade for that (use a camera and free software as sensor) For now I dont have the knowledge about how to do that. Any tips from forum members would be highly appreciated.

Just one more note: I'm not using galvo motors. These are not cheap, but I use a step motor instead (nema17). You can find nema17 step motors at ebay from US$12.

I do have a diffraction lens and I did try this method, but the problem is: it makes the laser light o lot less dim ( it divides it by 10 or 12 or more beams...) so it is not as bright as a stepper motor shining the same laser light.. This is a lot more bright. Also with the arduino I can...

Here is another video testing laser harp sensor: laser-harp-sensor-test-youtube.wmv - YouTube wqTnwCzXbnQ&context=C3bee5b3ADOEgsToPDskK_eo16Dp4pFZmG_ykfWqY9

ok here is a video if the video doenst work here is the link http://www.youtube.com/watch?v=Ggrh4GJyTQc&feature=youtu.be

I'm trying to post a video here... Here is a picture while I try that...

Guess what? I tried those 4x1.2 NiMH batteries, but they didnt last for 5 minutes... :( My original battery was also drained, so I got back to my 5volt 1A power supply... It seems like halloween here... Maybe because i dont like to solder things, and want to KISS (keep it simple stupid), I had...

Thanks again Sigurthr. You're very kind to share your knowledge with me! The battery label says 3000mAh, but I measure like this and it was about 500mA, so I think I can stick with the 2N2222. How can I measure how much voltage I am losing with the 2N2222? I am trying to use batteries...

After a lot of tests, trial and error here is what I have: I am using the 2N2222 to blink the laser. It works but I have found out that the laser light shines dimmer than when I use the original batteries without the 2N2222 in the way. So I would like to replace the 2N2222 with something...

Since I got no reply here it is again: I see everybody has at least a couple lasers. Can someone share with me your green lasers current (mA) consumption tests?