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 Forum index » DIY Hardware and Software » YuSynth
3 Channel mixer
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Satindas



Joined: Mar 26, 2011
Posts: 42
Location: uk
PostPosted: Sat Jul 09, 2011 4:32 pm    Post subject: 3 Channel mixer
Subject description: unused input?		 Reply with quote  Mark this post and the followings unread
Hi,
just looking at the the artwork for the 3 channel mixer and there appears to be provision for an additional input channel. Is there any reason why not to use it ? Would I have to change any of the input resistor values and U1a feedback resistor?
Thanks !
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vinnui



Joined: Jun 12, 2009
Posts: 19
Location: Hungary
PostPosted: Sat Jul 09, 2011 11:02 pm    Post subject: Reply with quote  Mark this post and the followings unread
The 1U 3 ch mixer, and the 2U 4 channel mixer uses the same PCB. Check out the 2U version, if you need more inputs, and gain control.
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Satindas



Joined: Mar 26, 2011
Posts: 42
Location: uk
PostPosted: Sun Jul 10, 2011 2:17 am    Post subject: Reply with quote  Mark this post and the followings unread
Thanks Vinnui ! I seem to be in the habit of missing the obvious at the moment Embarassed
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vinnui



Joined: Jun 12, 2009
Posts: 19
Location: Hungary
PostPosted: Sun Jul 10, 2011 4:21 am    Post subject: Reply with quote  Mark this post and the followings unread
I've made a PCB, based on Yves's schematics, which includes 8 inputs (with 120K onboard resistors). I'm using this PCB for my modular.

8 input mixer.zip
 Description:
Yusynth mixer with 8 inputs. (Eagle schematics/board + PDF PCB file)

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 Filename:  8 input mixer.zip
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Satindas



Joined: Mar 26, 2011
Posts: 42
Location: uk
PostPosted: Sun Jul 10, 2011 1:16 pm    Post subject: Reply with quote  Mark this post and the followings unread
Hey Vinnui that looks good ! Not sure if I need all 8 inputs though. I'm building a basic system for a friend with just 2 VCO's. I think 4 inputs should be fine Wink
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