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 Forum index » DIY Hardware and Software
Basic sawtooth VCO with Hard Sync input schematic?
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jackdamery



Joined: Apr 26, 2010
Posts: 73
Location: UK

PostPosted: Wed May 29, 2013 5:47 am    Post subject: Basic sawtooth VCO with Hard Sync input schematic? Reply with quote  Mark this post and the followings unread

I'm looking for a basic sawtooth VCO with Hard Sync input that could be fed a pulse wave to reset it and match the frequency.

Does such a schematic exist?
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johncronan



Joined: Feb 24, 2013
Posts: 42
Location: Chicago

PostPosted: Wed May 29, 2013 8:50 am    Post subject: Reply with quote  Mark this post and the followings unread

Perhaps a subset of the CGS48 (aka ASM-1) VCO? There's this:

http://pugix.com/synth/cgs-vco-project/

Which is exactly that, using the CGS48 PCB and includes some very good part value substitutions.

This also has square out, which is more than you asked for, but might as well use the other half of that TL072...

-John
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johncronan



Joined: Feb 24, 2013
Posts: 42
Location: Chicago

PostPosted: Fri May 31, 2013 4:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

Oh and for an even simpler one, single supply (9V), check out the VCO in the MFOS Noise Toaster. It won't accurately track V/Oct over nearly as wide a range though.
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