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Old 23rd October 2010, 07:00 AM  
Zen Mod and Spavleski is offline Zen Mod and Spavleski
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Join Date: Oct 2010
Default The Poor Serbian Man's Optical Attenuator

A gadget made by Spavleski & Zen Mod
Article scribed by Zen Mod



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Last edited by Variac; 2nd April 2011 at 12:15 AM.
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29th November 2010
wabun
diyAudio Member
Sorry as I still have another doubt, the split power supply which use LM317 for +ve and LM337 for -ve rails constant current source has different current output, although I constructed them with 22Ohms current limit resistor, but I got ~ 46mA at +ve rail and ONLY ~ 16 mA at -ve rail. By calculation I shud get ~ 56mA from each rail.. why this happen ? :-( tot LM337 faulty, but still the same even replaced with new IC.. I measure the current by connecting 100 Ohms resistor ( serial to ammeter)
and shorted the output ( LM 337 / LM317 ) reference to ground.. thanks
29th November 2010
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Zen Mod
diyAudio Member
lets continue talk about issues in proper place ;

Poor Serbian Man Optical Volume Control

this article interface isn't so convenient as we are used to - in threads , where we can post images easily
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
29th November 2010
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spavleski
diyAudio Member
continue here Poor Serbian Man Optical Volume Control
18th June 2012
precision1
diyAudio Member
Optical Attenuators

Thanks for another wonderful article. Where else could anyone get that kind of information in such a perfect way of writing? Iíve a presentation next week, and Iím on the look for such info.

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