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DACs / Re: Auto gain adjustment?
« on: February 09, 2010, 05:58:51 am »
Yeah, I tried setting it to 6 channel input mode and readjusted the correction amp and it works now!

Channel 4 on my correction amp seems to be dead though, maybe I accidently killed an opamp!

Oh well, I can just use 3 and 5 for the lasers :)


DACs / Re: Auto gain adjustment?
« on: February 09, 2010, 03:41:07 am »

It seems to be OK when the paddle is at the bottom! Weird ...

DACs / Re: Auto gain adjustment?
« on: February 09, 2010, 03:28:42 am »
I can see where I soldered goes directly to the chip.
I can make a movie if you like :)

DACs / Re: Auto gain adjustment?
« on: February 09, 2010, 03:15:38 am »
So, should I leave the wires where they are but desolder all the decoupling capacitors?

DACs / Re: Auto gain adjustment?
« on: February 09, 2010, 03:06:28 am »
I have it connected as here:

I don't see anything that resembles 50hz, the vibration changes when I change the position o the paddle (In zoof's laser tennis, for example).

Not sure about how clean the USB power is, and this is on a laptop.


« on: February 09, 2010, 02:38:26 am »
I have the same drill for home use, they are quite nice :)

DACs / Auto gain adjustment?
« on: February 09, 2010, 01:57:17 am »
Hi, I have one o the new L shaped sound cards. I have it all connected up and working, but ...

I have "System input" set to 8 channels, and Analog output set to 6 speakers. Volume is up max, EQ is default etc. Nothing else is changed.

However, the scanned output is continuously vibrating (Mainly near the edges)

I am assuming this is the gain correction thing in the sound card, but I'm not sure what to do about it. If I set "System output" to 6 channels, I get a much smaller scan angle, but it seems to fix the vibrating thing.

Anyone got some things I can try to get rid of the annoying vibrating edges?


And Now For Something Completely Different! / Re: SDL?
« on: June 06, 2009, 02:02:14 am »
Uh wow, scale:2 makes it HUGE!

Then again, my eee pc screen is only 8.9", which is probably the problem :(

And Now For Something Completely Different! / SDL?
« on: June 05, 2009, 10:19:45 pm »
I have this "game" ( google "The Powder Toy"), and it is based on SDL (Just like laserboy for windows).

What I wanna know, is if there is any way to make the window bigger? I think I remember there was a feature that came with laserboy that let you resize the window. Any idea's?

-Dan ;)

Hinged Newt / Re: My Spaghetti Show
« on: April 22, 2009, 09:53:53 pm »
That is a complicated subject and there is a little history behind it as far as Spaghetti is concerned.  I'll try to explain but you'll probably have to reread this a few times before it settles in.

The Frame Rate set for the Spaghetti project is how fast the DAC will be updated.   When an ILDA source is set to "Frame Based" modes, a new frame will be sent with each update.  This is basically like playing a film.  If the project frame rate doesn't match the speed of film the animation will appear to be to slow or fast.  "Frame Based" mode is what I initially started with in Spaghetti.  It was the only mode.  If I started over I would not have this mode and I have considered removing it.  In Time Based mode, you can stretch the ILDA file out or shrink it.  The DAC will still get updated at the project frame rate but if the ILDA file is stretched out twice as long as it has frames, each frame in the file will be sent to the DAC twice.  If the file is shrunk to 1/2 of the normal length, every other frame will be skipped.

If the source ILDA files have a large number of points per frame, the frame rate has to be low or else frames will be skipped.  This is because there is a limit to the number of points per second that the DAC can display.  If the DAC max is 30Kpps then if the frame has 6000 pts in it then the max frame rate is only 5FPS.  If the frame has 100 pts then the max frame rate is 300FPS.  So what do you pick?  Generally, if you leave it at 30 you will be OK.  There is a reason for bumping it up, though.  If you are doing something like beams shows with not too many points in them, specifying a higher frame rate will give you smoother effects.  You will be able to apply fast rotations to objects and they will appear to rotate smoothly instead of jerk.

hey Gary, so does that mean that with a lower FPS rate in Spaghetti, the output would be much more "jerky"? than if you set it to say 30FPS? Whats a good FPS for syncing with songs? I think this may have been the problem with my frames not maching up with the music :) What FPS rate do you typically use?

Other software / Re: Check this out
« on: April 22, 2009, 09:49:08 pm »
How about asking "Lazarus" on PL how he made his abstract generator for LFI player, it works really well IMO :)

Actually, isn't LFI open source? Maybe an idea for Gary to add to Spaghetti/Wet Noodles :)

DACs / Re: The HakDAC
« on: April 21, 2009, 11:29:17 am »
We are getting the Prototype parts list together slowly, and starting to order in parts. This will be a long stretched project tho  :)

-Dan  ;)

DACs / Re: The HakDAC
« on: April 21, 2009, 01:14:22 am »
It's actually a very simple device, and to get to the DAC stage only requires 2 chips, then we just need to amp it up, which can be done with opamps.

DACs / Re: The HakDAC
« on: April 20, 2009, 12:34:46 pm »
Nah, it wouldnt be for use with the actual Moncha software, but I meant that it would be compatible with things like your Spaghetti Moncha driver. You have to pay for the Moncha software anyway. I with you though  :)

DACs / Re: The HakDAC
« on: April 20, 2009, 12:01:59 pm »
It wont have the network or SD card features, but it will be 16bit on all the channels, and will allow as many points per frame as the software does. Although, once we have the general DAC itself going, adding support for network and SD playback would not be too hard. I think this would be one of those open-source DAC's too tho, so you could build it yourself, but I will go more into those details as we move on. :) The DAC chip itself can handle up to 96Kpps, but thats not taking into consideration the USB speed etc, but it will deffinitely be capable of 30Kpps speeds -- Moncha and Spaghetti only go up to 30Kpps anyway. Also, if you had scanners capable of 96Kpps, I dont think you'd be cheaping out on your DAC :P

And it will be a fair bit less than $200 ;)

EDIT: And yeah, it will have buffering, all sorts of crap can come from Windows hahaha  ;D

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