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9v single supply Simple LM741 Triangle LFO: CV possible??
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beep



Joined: May 05, 2013
Posts: 84
Location: Germany

PostPosted: Sat May 18, 2013 4:32 pm    Post subject: 9v single supply Simple LM741 Triangle LFO: CV possible??
Subject description: works on breadboard (with video)
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Finally breadboarding again. Sample & Hold Tomorrow. Today Triangle Love.

I did no more than taking the triangle generator example circuit
from the falstad circuit simulator and replaced the ground with
4,5v and the op amp power supply with 9v and 0v, which is battery
instead of professional dual power supply.


I posted the schematics. Values may vary. But this circuit works.
Gonna build shitloads of them.


Modulationskrieg!!!

Link to falstad sim of this thing:

Falstad sim of this

This might be very simple and basic and for noobs and stuff, but since
I'm a noob, it's very useful to me and easy to build, so I want to share it.

Is it possible to add CV control for the frequency? Diode to ground
like in Metal_Head's superb vco and vcf designs? I noob, I Very HappyD

That would be amazing! LFO modulates LFO which modulates LFO <3

Now let's build shitloads of them and connect them to organic
modulation textures for everyone!!!

gonna try 358 instead of 2 741s tomorrow Very Happy


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Last edited by beep on Tue May 21, 2013 9:22 pm; edited 1 time in total
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beep



Joined: May 05, 2013
Posts: 84
Location: Germany

PostPosted: Mon May 20, 2013 11:02 am    Post subject:
Subject description: Works too on 358 :D video now.
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yaay. resistor between first opamps output and second opamps non inverting
input determines frequency. amplitude doesn't change with frequency like on the squarewave-trough-RClowpass faux Triangles Very Happy

using trimpots, being able to make 100s of triangle LFOs for under 1€ each.

Never say Synth DIY wouldn't be cheaper!

MODULATIONSKRIEG!

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beep



Joined: May 05, 2013
Posts: 84
Location: Germany

PostPosted: Tue May 21, 2013 2:33 pm    Post subject: Reply with quote  Mark this post and the followings unread

updated schematic with 100u cap, 5k pot and 100R resistor in series to the pot[/url]
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