Author Topic: Totally in the dark..Newbie DAC ?????  (Read 31623 times)

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Offline mooljacc

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Re: Totally in the dark..Newbie DAC ?????
« Reply #15 on: December 27, 2010, 02:10:55 pm »
Thank's for the advice James :D , but for start I will build just 3 chanel green laser projector,I was find this shema is this a new version of DAC ??? Can I use  5.1v zenor diode for voltage regulator from the previus shema ??
thank you




Offline meandean

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Re: Totally in the dark..Newbie DAC ?????
« Reply #16 on: December 27, 2010, 03:58:17 pm »
Can I use  5.1v zenor diode for voltage regulator from the previus shema ??


  That depends on the soundcard you use. Some of the new USB soundcards have a lower DC idle voltage (1.25v instead of 2.25v).
If your card has the lower output AND you are using the original schematic, use a 3.3v zener instead of the 5.1v. A value of
100K for the gain adjustment (R5) instead of 50k will give increased gain range, and it is a good idea to use external
potentiometers for X Y gain (instead of trim pots), so that you can easily adjust image size when you need to.

                                     Dean
"Patience is for the dead."

Offline mooljacc

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Re: Totally in the dark..Newbie DAC ?????
« Reply #17 on: December 27, 2010, 10:37:38 pm »
Thank you guys .... I will buy parts this week , and start to build DAC. Is enyone try to make galvos with Neodymium magnets I was find this on youtube

Making of: My DIY laser scanner









Offline meandean

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Re: Totally in the dark..Newbie DAC ?????
« Reply #18 on: December 28, 2010, 07:52:42 pm »
 You are making your own galvos? I'm impressed!
 
 Let us know how it turns out.
"Patience is for the dead."

Offline mooljacc

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Re: Totally in the dark..Newbie DAC ?????
« Reply #19 on: December 28, 2010, 10:11:34 pm »
I will...  ;D

 

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