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 Forum index » DIY Hardware and Software » The layout factory
Another pair of eyes on this ADSR Layout please...
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JRock



Joined: Mar 05, 2010
Posts: 80
Location: Bucks County, PA
Audio files: 1

PostPosted: Mon Mar 28, 2011 4:52 am    Post subject: Another pair of eyes on this ADSR Layout please... Reply with quote  Mark this post and the followings unread

Building Rene Schmitz ADSR.
http://www.uni-bonn.de/~uzs159/adsr.png

Any reason this shouldn't work? Can anybody pick out discrepancies in my layout?


I'm beating my brains out on this. Maybe someone more knowledgeable can pick my mistake out? M aybe I just need a pair of fresh eyes on this.

I added 100 Ohm pulldown resistors to the unused inputs of the 4001.

The gate doesn't seem to affect it and the TL084 is getting warm. I get +10V from the voltage divider on the 4th opamp...


Thanks!


RS Logic ADSR Placed#1RoutedTop place Names.pdf
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RS Logic ADSR Placed#1Routed Etch.pdf
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brock



Joined: May 26, 2011
Posts: 96
Location: Canada

PostPosted: Fri Jun 24, 2011 5:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

Did you get this to work?

I notice you missed the mod that Rene mentioned in his ADSR page:
Quote:

Discrete ADSR
The original circuit was found in the Music Machines diy-archives. Its a design by Barry Klein. I started to expand it from the Original AD-envelope to an ADSR envelope. Make sure you add a 2.2kOhms resistor in series with the Attack and Decay pots, this prevents clicking and an unwanted latchup condition for the flip-flop.


Perhaps you are seeing the flip-flop latchup.
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