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.
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..
nice. any links to a tutorial on how to do this? and i thought these green laz0rs needed to be turned off for a few seconds after a minute or so of use? how does that work in this case?
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.
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
Comment removed
M1zw1z 3 years ago
It really would be nice to have a little bit of a tutorial...
andurilfromnarsil 3 years ago
Hi Brill Laser Effect Could You Tell Me How To Make It Like A Schematic Or A Guide Or Summat Please Thanks
lowe2oo7 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
do you have a circuit?
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pgvphimzbhsx 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
ok thanks, sounds like more hassle than it's worth for now anyway :(
nematix 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
nice. any links to a tutorial on how to do this? and i thought these green laz0rs needed to be turned off for a few seconds after a minute or so of use? how does that work in this case?
nematix 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
I can't get my head around how you used the steppers to get those effects. BTW, what PIC did you use?
hankfletcher 5 years ago
sweet!
hankfletcher 5 years ago