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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Super Simple Ramp and Sawtooth LFO
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Ojd



Joined: Feb 22, 2008
Posts: 65
Location: Ua
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PostPosted: Mon Mar 16, 2009 2:39 am    Post subject: Super Simple Ramp and Sawtooth LFO
Subject description: Can I get triangle out of it?		 Reply with quote  Mark this post and the followings unread
http://musicfromouterspace.com/analogsynth/NewAugustRampLFO.html
I was looking for some mini-LFO, (in matter of size of the PCB, and complexity) to put it into mini-modular-audio processor. With such simplicity i could put 2 of them. But they would be useful to me only having simple triangle modulation.

For my n00b electronic knowledge if i connect together saw and ramp i should get triange, right? If now, where else should i look for these simple 0-5V tri LFOs ? Its a simple question, really.
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g.gabba



Joined: Nov 29, 2008
Posts: 36
Location: berlin
PostPosted: Fri Mar 20, 2009 11:10 am    Post subject: Reply with quote  Mark this post and the followings unread
sine tri ...
http://www.elexs.de/sinus1.htm
replace the 0,1 µF whith a 100µF elektrol Cap

u can turn a saw in a triangle wave,

imagine cut the positive and the negative part of the saw in 2 pieces

mirror the negative to positive --> u got a tri wave

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richardc64



Joined: Jun 01, 2006
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PostPosted: Fri Mar 20, 2009 1:46 pm    Post subject: Re: Super Simple Ramp and Sawtooth LFO
Subject description: Can I get triangle out of it?		 Reply with quote  Mark this post and the followings unread
Ojd wrote:
For my n00b electronic knowledge if i connect together saw and ramp i should get triange, right? If now, where else should i look for these simple 0-5V tri LFOs ? Its a simple question, really.


Select neither, that is, use a switch with a center off position. Or omit the diodes, switch and R1 altogether. But that MFOS circuit runs on +/-12v. For a single-supply LFO you could use the one in the DS-7. It runs on 5volts and uses half an LM324, so you could get 2 out of one IC.

Here's another simple one that might work at 5volts.

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Ojd



Joined: Feb 22, 2008
Posts: 65
Location: Ua
Audio files: 1
PostPosted: Sat Mar 21, 2009 12:31 am    Post subject: Re: Super Simple Ramp and Sawtooth LFO
Subject description: Can I get triangle out of it?		 Reply with quote  Mark this post and the followings unread
Thank you for the replies. Really easy mod.

The project on which I'm working now, is modular system of sound processing, that includes extensive filter/EQ section, Distortion/Fuzz/Waveshaper, Flanger/Chorus/Delay.
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