Cheapo Laser Effects
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Uploader Comments (deludedrich)
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All Comments (13)
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It really would be nice to have a little bit of a tutorial...
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Hi Brill Laser Effect Could You Tell Me How To Make It Like A Schematic Or A Guide Or Summat Please Thanks
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do you have a circuit?
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ok thanks, sounds like more hassle than it's worth for now anyway :(
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Hi all - this laser unit has now been radically changed to run without USB or a PC. I've added a old music-light PCB I knicked from a cheapo PC mod to allow it to syncronise to the music.
Unfortunately I could never get the stepper motors to run fast enough to draw a good image, so now it's limited to a single beam that moves to the beat of the music, and a horiz or vert scan when the music goes quiet. Amazingly, this seems to work better than all the effects in the original unit.
deludedrich 3 years ago
Yes, although I've done a few mods since the original design. You also need the ability to program a PIC18 chip.
Good news is I've finally found the .inf file you need to make the PIC USB firmware work with Vista :)
deludedrich 4 years ago
It's not the easiest solution, and you can find products with fairly powerful lasers that can draw resonable images on eBay for not too much.
However, I'm a geek so had to design and build one myself :)
deludedrich 5 years ago
Yes, the green lasers get hot if not cooled. I've got an old heatsink + heatpipe from a laptop - I've wrapped the copper pipe bit around the laser diode and it keeps it quite cool.
I have another laser crab that I've added a green laser too - I used a copper pipe bracket to mount the laser to an old heatsink, and put a PC fan on top to keep things cool
Not really easy to do a tutorial as the controller is 2 custom built PCBs with surface mount components..
deludedrich 5 years ago
PIC 18F2550 - uses a 128kHz interupt to generate a 64bit PWM singal for each stepper. The steppers inductance is enough to make the PWM in to analogue, and gives a fairly proportional rotation between from one step to another.
The steppers were bought from ebay with the mirrors already on, so I assume they were chosen to have good capabilities for laser control.
deludedrich 5 years ago