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 Forum index » DIY Hardware and Software » YuSynth
unspecified capacitor types on BOMs
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WooDaWii



Joined: Jul 12, 2014
Posts: 7
Location: Quebec city

PostPosted: Sun Jul 13, 2014 11:38 pm    Post subject: unspecified capacitor types on BOMs
Subject description: planning on building a few modules - what types would fit?
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I've created a gigantic excel sheet for each component of several modules I plan to build but noticed that some modules (i.e. minimoog filter, CV, LFO, etc.) have capacitors whose types are not specified. Would either ceramic or film fit all of them?
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electrotech



Joined: Apr 24, 2013
Posts: 12
Location: Scotland

PostPosted: Thu Jul 17, 2014 1:53 pm    Post subject: Reply with quote  Mark this post and the followings unread

I don't think you should use the same type for ALL circuit positions. The best type will depend on where it is in a circuit and what it's doing.
Assuming you're talking about non-polarized types, generally you'd use ceramic for decoupling purposes e.g. to remove noise from supply rails and polyester film would be used in most other positions. e.g. coupling/DC blocking.
Exceptions would be in sample/hold circuits where low-leakage is a priority and VCO's where the timing cap should preferably be polystyrene or other high stability type.

Hope this helps,

Andy
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