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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
stripboarding MFOS gate buffer
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olledahlberg



Joined: Nov 28, 2012
Posts: 23
Location: sweden

PostPosted: Sat Aug 24, 2013 2:15 pm    Post subject: stripboarding MFOS gate buffer Reply with quote  Mark this post and the followings unread

I could need some help to make this right. I have no idea if Im even close to a correct layout...
Im making my first stripboard layout. It the gate buffer from MFOS "Control Voltage And Gate Distributor" to split a gate signal into many.
Im only doing the board no 3 from Rays schematics found here http://www.musicfromouterspace.com/analogsynth_new/CVANDGATEDIST/pdf/schematic_pg1_schem.pdf

on this picture, it looks like Ray have put two additional yellow caps close to the IC. I cant find these caps in the schematics, and nor the electrolytic caps to the left side on the board here:
http://www.musicfromouterspace.com/analogsynth_new/CVANDGATEDIST/images/cvandgatebuffer_photo3.jpg


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olledahlberg



Joined: Nov 28, 2012
Posts: 23
Location: sweden

PostPosted: Fri Oct 25, 2013 11:53 am    Post subject: Reply with quote  Mark this post and the followings unread

just wanted to say that it works. Input signal is on right side of IC, dont exactly remember where now, but look at the original diagram
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Skrog Productions



Joined: Jan 07, 2009
Posts: 778
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PostPosted: Fri Oct 25, 2013 12:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi , on the picture the little ones either side of the chip i'm sure are de-coupling caps , usually around 100nf , in most synth designs you would have these as close to the supply legs of any chip ( 1 cap between + & 0v and 1 cap between - & 0v).
The bigger aluminium electrolytic caps where the pcb power connections are, they smooth the incoming supply , these are polarity sensitive , on the pic you will see the positive smoothing cap +leg to +12v / -leg to 0v , the minus smoothing cap +leg to 0v / -leg to -12v.

On any other of Mfos circuits , say the vcf schematics , there is a bunch of caps on power connections these denote bypass/decoupling/smoothing caps , some circuit diagrams don't show these caps as the designer assumes the builder knows where to put them.

As a general building rule most circuits especially supply ripple sensitive circuits should have decoupling / smoothing caps.

Smile
Dave.

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olledahlberg



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PostPosted: Fri Oct 25, 2013 2:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

ok, thats good to know. Maby I should add this to the layout
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