Topic: I want to build a DAC for Raspberry Pi 2

[James]

Thank God I've found Laserboy

I think that's the best thing anyone ever said about my work!

I'm really glad you are getting a lot out of LB.

That has been the whole point all along.

When I get my Linux Monster Machine up and running, I will definitely have a Python environment.

I'd love to see what you have there on my own machine, if that's OK with you.

Looks like you have a system that works very well!

Congratulations!

I have an idea of how good it feels to finally see something that is totally what you want and totally under your own control because you understand every part of it.

I knew you could do it!

AWESOME JOB.

James.

[emanuel]

Thank you!

[James]

Here you go!

http://laserboy.org/free_art

James.

[James]

You're a coder, so I think you'll like every_byte.ild

[emanuel]

cool, now I'll build a webif to control the player on raspberry.

[emanuel]

webif for raspberry on default localhost:8100


can you test?


I've got always an single sharp beam in the middle, while changing picture on audacious player

[James]

OK. I'll try this out as soon as I can.

I'm waiting for the truck to show up with my new 65 inch curved screen LCD 4K monitor!

I got my monster RAID machine set up and working with Xubuntu.

I'll let you know.

James.

[James]

Well...........

I now have a 65 inch curved LCD 4K monitor!

I am typing this while looking at 3840 x 2160 pixels!

F**KING STAR TREK and shit! 

Things look a little weird at this high of a resolution.


A lot of stuff just wasn't designed with this many pixels in mind.

James.

[emanuel]

high res times

[emanuel]

new version, fixed "sharp beam issues" while zapping wave files.

[emanuel]

I've found out sadly my laser power supply does only bring TTL/dotted points on low signals ~40%, higher signal is full power, lower signal is off.


Is der a way to build an amp kit to modify a TTL power supply, in order to use as analog?

[James]

Uh.... I'm not sure I know what you mean.

You can get a laser diode driver that has analog modulation.

But you have to know a bit about laser diodes and how to power them to be able to use one.

If your green lase is TTL, there is probably nothing you can do about it. It is not just a simple diode.

It's diode pumped solid state or DPSS. It's quite a bit more complicated than a regular diode laser.

James.

[emanuel]

If I connect the projector with the DB25, it will be set to "Auto mode". From that point no more DMX input is noticed.
Do you think, I can just build in a switch at the 4/17 pin short connection, to set on/off Ilda mode?

[James]

That would be a good guess.

That is the safety interlock switch.

You could also try taking the +5VDC off of pin 13.

That is there to activate (open) a shutter.

Since you have a projector with modulated lasers, you don't have a shutter. But your projector might still  sense that voltage.

James.

[emanuel]

Ah ok, I will test.