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Old 10-15-2007, 08:16 PM #1
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Default idea for a laser show thing

ok, i work at maplin electronics - for those of you who are from england, you will know we stock various disco lighting and equipment and stuff..

well, the other day we got a laser crab in stock, so i decided to have a look at it.

wow!! its surprisingly simple!, so it got me thinking.

if i get 2 motors and a green laser, some potentiometers*... could i make my own?




*potentiometers would need to be able to change the polarity of the current at mid point for the motors to go both clockwise and anticlockwise.

when im nect in, i shall take some pictures, and hopefully tomorrow i will have some plans drawn out.

-ben


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Old 10-15-2007, 09:22 PM #2
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Default Re: idea for a laser show thing

Ben: That would work fine. My homemade XY scanner was ripped of of a laser light show thingie. I removed the module and bored open the casing to allow me to line up any laser into the mirror cavity, I have a pot on each motor, but I cannot reverse the polarity and make them spin the other way.

But it works well and I can get some nice effects. This was a couple of picture Merl took, last time we tried it out, power was about 250mW (when the spyder11 behaved)

http://www.laserpointerforums.com/fo...=1188759399/30

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Old 10-16-2007, 12:48 AM #3
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Default Re: idea for a laser show thing

In order to reverse the polarity of the DC motors, and make them spin the other way, you can use a series of reed switches, and iwth the flick of a switch (or two) you can reverse the direction of the motors. Take a peek on Intructables.com, and do a search for reed switches - it goes into great detail, as well as plenty of plans :-)
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Old 10-16-2007, 05:36 AM #4
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Default Re: idea for a laser show thing

you can do it with a pot, but it can get complcated that way. i would do as greg said, and use reed switches. disco lighting?? i love that kinda stuff!
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Old 10-16-2007, 11:31 AM #5
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Default Re: idea for a laser show thing

i got ym laser crab from maplin.

look on my site under projects and errr modded crab i think.

http://www.laser-man.co.uk/2006/inde...2&Itemid=6
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Old 10-16-2007, 12:39 PM #6
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Default Re: idea for a laser show thing

andy_con, how hard was your XY scanner to make?
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Old 10-16-2007, 03:53 PM #7
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Default Re: idea for a laser show thing

if you mean this

http://www.laser-man.co.uk/2006/inde...3&Itemid=6

then its not worth the effort. now i know what i know, i would just buy a 10k scanner set off ebay. million times better and comes complete
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Old 10-16-2007, 08:34 PM #8
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Default Re: idea for a laser show thing

You may want to check this out for ideas as well http://www.laserpointerforums.com/fo...num=1186862602

Regards rog8811

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Old 10-16-2007, 08:44 PM #9
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Default Re: idea for a laser show thing

http://cgi.ebay.co.uk/SCANECO10-10kp...QQcmdZViewItem
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Old 10-18-2007, 02:58 AM #10
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Default Re: idea for a laser show thing

In considering an counterclockwise motor rotation you have to make sure they're not brush motors too because then the cavity inside would burn out and it might as well be a poorly spinning paperweight.
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Old 10-18-2007, 03:27 AM #11
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Default Re: idea for a laser show thing

oh if you have a look at chinesedeparmentstore.com, they have very cheap 10K glavo's!
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Old 10-18-2007, 11:29 AM #12
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Default Re: idea for a laser show thing

Quote:
Originally Posted by things
oh if you have a look at chinesedeparmentstore.com, they have very cheap 10K glavo's!
very cheap, these scanners will do every beam show you throw at them, simple graphics and simple animations.

worth every penny
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