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Messages - Xer0
1
« on: March 16, 2010, 09:40:38 am »
Hi. mhh i have lots o stuff to do for college now, but when i get time i will resolder the color outs to the positive ilda pins like it was bevore. that should fix it. all other stuff like x/y (with inverting jumpers, ftw!) and interlock port (can just jump it or connect a looongcat cable with a switch to it) is working like a charm.
besides: why noone ever used a Max232 to make +-10V from 5? its a fully integrated circuit and much cheaper than any dcdc stuff
2
« on: March 07, 2010, 07:19:40 pm »
Mhh strange. is'nt working still. Singals are right, connectors are right. But ist dont lase. Only when i plugged the Plug half in it startet to make a picture. but as soon as i put hte plug more in it stops. some kind of Short somewhere... and the Blankin ist wrong again. maybe i should stick with the "Out to +" connection i had on the Breadboard
3
« on: February 26, 2010, 08:38:38 pm »
Mhh i hope it will. i soldered almost anything on the board already, now its one of the last things that have to be connected. if i can switch, i just to straight from the legs of the 100ohm resistors to the socket header. otherwsie, i have so put a wirte around or between the legs. not that difficult, but uncomfortable ^^ // mh and i have to get 2 quadjumpers too. to switch x and y when needed 
4
« on: February 26, 2010, 08:17:59 pm »
Boys.. .very important question:
When i use single ended for colors, wiht inverting amps... on the breadboard i had the ilda colors + pins connected to amplifier's output and the - ones to gnd. Can i switch this, so going with - to opa's out and + to gnd, then set "invert on" in the ezauddac driver? can this work with laserboy too? it would simplify my soldered board design!
5
« on: February 24, 2010, 08:11:04 am »
It's the one James uses for all his channels.
Just that i took a TL074 quadopamp, 8x 10k resistor for signal + vref in, and 4x 50k pot for gain adjustment. these are 1-turn trimmers so not really precise, but its TTL anyway.
Vref is adjusted via an inverting gain<1 amplifier, from LM336's 2,49V to globally -2,23V
6
« on: February 23, 2010, 07:57:44 pm »
Do you think it could be cause i dont use any caps on outputs?
I only have some electrolytic Caps between +5V/GND, -5V/GND and +5V/-5V
Where i should plase the bunch of tantalum 100pF caps i bought?
7
« on: February 23, 2010, 06:54:31 pm »
OK... almost anything allright now. I used a TL074 for the color channels, Amp to max 4V
But still some very strange issues:
1. Had to change color chan assigment for correct output. on some frames still wrong
2. the picture sometimes "hops" barely noticable down and up again. On some of the Test Frames in HE Laserscan, the otherwise blanked colors in this moment apear again.
8
« on: February 23, 2010, 05:54:34 pm »
RAR'd Waves are very small... or why not FLAC?
9
« on: February 23, 2010, 03:56:51 pm »
Where did you get circle.wav ?  I dont have circle.wav. I red about it somewhere but cant find it nowhere anymore. My thougt was that max.wav is a circle so thats why the whole setup semmed not beeing working for me...
10
« on: February 23, 2010, 02:46:52 pm »
I didn't got "into" Laserboy yet. HE is a Point&Click App ideal for Windows Users like me xD so i used this to make the test runs. Yeah Blanking is strange yet. have to connect one of the colors to -5V and the others to SC out. then one color is blanked and the other stays. So in need to build an single ended RGBI amp stage on my breadboard too. Or is there a way to make the Soundcard output a DC voltage higher then 2.5V ? (TTL)
11
« on: February 23, 2010, 11:04:14 am »
Boah i am noob -.-
Played always max.wav and assumed it makes a circle, than wondered why the output dont changes/laser dot is beyond output window.
Now with HE is finally does scanning! but i have to build the color stage too, no blanking
12
« on: February 23, 2010, 07:34:02 am »
You can get to all the wires inside the projector, correct? Noo... i didn't opened it yet. want to keep it sellable after im bored by it, so have a bit fear of fizzling into it. anyway i would need some kind of 25pin rm 1,25 connector, thats what the board inside is connected on. now i have my db25 female plug - but still it dont works like it is supposed too!
13
« on: February 23, 2010, 07:04:26 am »
How much to D?
14
« on: February 22, 2010, 06:24:56 pm »
Aww... still in Memphis. (nah, not really there, but still not delivered to my house ^^)
But in the spare time i redesigned the Vref Circuit and using teh 10k Poti which have been unsed for LM336 fine adjustment now instead in the inverting buffer to make precise -2.23V from a stable +2,49V ref. Yes my SoundCard has 2.22-2.24V offest. lol
15
« on: February 21, 2010, 07:57:18 pm »
How? In my Breadboard they are temporarly, i just soldered pins to the 25 wires of a flat cable. bu to connect it to the Laser i need a DB25 female. and i bought male, so i tried to feed it through the "Out" port, while i ordered the right plug and waiting for it
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