ld2000 color palette sulution rgb and intensity control from one card

[ultrashow]

Hi
I'am looking all day solution how to make analog palette for green laser connected to intensity/blanking and rgb laser to R,G,B pins all lasers are analog and have one pangolin LD2000 card. When I configure palette "color laser" then have ttl o intensity pins[need analog modulation]. When use "one color" palette works fine but only on green lasers connected to intensity. Is there any trick work both of lasers in analog from one card? Greens are sats on both sides and color on the middle, standard set.
Im found this:
"http://www.pangolin.com/forums/showthread.php?t=102&highlight=palette"
there is a link to solution, but doesn't work:
"http://pangolin.com/cgi-bin/ultimate...c;f=1;t=000033"
anybody?

thanks, sorry for english ;]

[buffo]

Wait - you want to use the same color palette to control one RGB projector with analog modulation and another green-only projector that also has analog modulation? Why would you want analog modulation on the second (green-only) projector?

If you wanted TTL-only on the green projector, you could use the intensity signal as the modulation input on that projector and it would work fine. But in order to have true analog modulation, you'll need to build a separate circuit that will sum the red, green, and blue modulation signals together.

Adam

[ultrashow]

Exactly that what you said, but I don't like ttl mod because in livePRO I need brightness control for "green-only" too. That's true I have ttl on "intensity signal" now when configured palette for color laser. Can I get somewhere "separate circuit" diagram? This is that what I need I think ;]

[megaton]

Hi

In LD2000 is there 6 color output right?
So is possible to output RGB and another color assigned to G with analog modulation and put all the RGB in this (like White)but for a G to modulate with all colors. And just use this pin for this Green?

Pins 8,9 and 10. I use it for another RGB PJ in my set up.

Cheers,
Ed
PS I hope this helps.

[ultrashow]

I think there is no possible send all 3 colors to one pin but I will try

[megaton]

I think there is no possible send all 3 colors to one pin but I will try

Yes you are right
And I try this and works, I put 3 resistors of 10Ks on each extra pin and tie together and use this as the input for a one color laser.(I think if is enough high impedance at the input modulation works fine).
I train my pallet for 6 colors (2R 2G 2B) and presto. First 3 for one RGB and the others for the next.

I hope this help.
Ed

[buffo]

I think you'd be better off using three diodes (one each on the Red, Green, and Blue color lines) to isolate the point where you tie them together from the other (RGB) projector. Those 10K resistors aren't going to completely prevent the color from one line bleeding over to the others, and this may change your color balance on the RGB projector. A diode will stop that.

Actually, the *best* way to do this would be to buffer the signals first, and then adjust the individual gain on each to 33%, and then sum them all together, but that's probably overkill for your application.

Adam

[mixedgas]

The circuit you need is called a precision rectifier, no diode offset voltage and little load on your RGB outputs.
The pots let you adjust for palette issues.
The Zener diode ensures your laser is not overdriven.
The op-amp compensates for the diode forward voltage drop.
OK to increase 240 ohm resistor to 470 if clipping causes distortion.

See attached

The Intensity channel is perfect for this on Pangolin Products.

Steve