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astroman
Joined: Sep 13, 2012 Posts: 44 Location: UK
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trav
Joined: Sep 11, 2012 Posts: 108 Location: Auckland
Audio files: 16
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Posted: Mon Jul 15, 2013 4:46 pm Post subject:
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Sounds? (away from my breadboard)
I was messing around with 4046s a while ago, trying to make an all-in-one design like PHOBoS's module, but in the end I opted to make several simpler circuits, like yours, instead.
Connect pins 3 and 4 and have a listen on pins 1 and 2 as well... |
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ZiLaiHong
Joined: Feb 01, 2012 Posts: 2 Location: Beijing
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Posted: Sun Nov 10, 2013 12:47 am Post subject:
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Thank you for sharing astroman!
I quite love the simplicity of that!
My question is that, do you use a 10uf and 1uf cap connected in parallel for that 11uf cap?
Thanks. |
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Cynosure
Site Admin
Joined: Dec 11, 2010 Posts: 966 Location: Toronto, Ontario - Canada
Audio files: 82
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Posted: Mon Nov 11, 2013 1:04 pm Post subject:
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trav wrote: | Sounds? (away from my breadboard). |
I second that. Please post some sound samples if possible so we can hear it.
Thanks! |
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rossics
Joined: Nov 23, 2013 Posts: 12 Location: Australia
Audio files: 1
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Posted: Sat Nov 30, 2013 8:59 am Post subject:
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I couldn't get that diagram working, other circuits I've seen using the 4046 have the input at pin 14, will try again in the morning |
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DUBmatze
Joined: Feb 18, 2013 Posts: 150 Location: south Germaica (schwabilon)
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Posted: Sat Nov 30, 2013 9:33 am Post subject:
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rossics wrote: | I couldn't get that diagram working, other circuits I've seen using the 4046 have the input at pin 14, will try again in the morning | do you have powerd it on pin 16? |
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rossics
Joined: Nov 23, 2013 Posts: 12 Location: Australia
Audio files: 1
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DUBmatze
Joined: Feb 18, 2013 Posts: 150 Location: south Germaica (schwabilon)
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Posted: Sat Nov 30, 2013 4:55 pm Post subject:
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as far as i see this is just a simple vco witch is feed with a "audio" signal as CV. I think you cant feed a "normal audio" signal in (negativ volatage...)
so whats happens when you just feed power into the circuits input and playing arround with the pot? (and dobble check pin 5 it must be groundet). if you still cant hear somthing touch pin 11 and / or 12 (min and max Freq) with your fingers - in case of fear -> use resistors to ground
I was trying this last week with a arduino Tone synth (with some notes from midi - sketch say ist from Greg Kennedy 2011, cant find URL atm) all i get was a distortion (a nice distortion) similar to this: https://www.youtube.com/watch?v=lF-FQzE0F0U |
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rossics
Joined: Nov 23, 2013 Posts: 12 Location: Australia
Audio files: 1
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Posted: Sat Nov 30, 2013 6:55 pm Post subject:
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I built a version more closer resembling the 2nd diagram, not the OP's one and it worked but it wasn't a filter it was more of some crazy effect.
I managed to get the first diagram working, I had to run pin 11 to gnd through a resistor, and I was also pumping strong signals into from a bare 40106 oscillator, wouldn't work with line level signals |
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PHOBoS
Joined: Jan 14, 2010 Posts: 5591 Location: Moon Base
Audio files: 705
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Posted: Sun Dec 01, 2013 5:46 am Post subject:
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rossics wrote: | ...wouldn't work with line level signals |
correct, the CV input range is somewhere between 0.9V and close to Vdd which is much higher then a standard line level signal.
So if you want to use it for that you'd have to add an amplifier to boost the signal. Or you could use something like Tim Escobedo's PWM.
I wonder if the result is similar to this. _________________ "My perf, it's full of holes!"
http://phobos.000space.com/
SoundCloud BandCamp MixCloud Stickney Synthyards Captain Collider Twitch YouTube |
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acidblue
Joined: Jun 26, 2009 Posts: 226 Location: The Darkside
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Posted: Mon Feb 03, 2014 4:28 pm Post subject:
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C2 value definitely needs to be higher, like a .1uF, sounds much better with a higher cap IMHO.
BTW is there a way to add resonance control to this filter?? |
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DUBmatze
Joined: Feb 18, 2013 Posts: 150 Location: south Germaica (schwabilon)
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Posted: Tue Feb 04, 2014 5:23 am Post subject:
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acidblue wrote: | BTW is there a way to add resonance control to this filter?? | maybe by adding a pot to Pin 11.
A other way to get somthing (maybe strange sound) out of it is feeding the orginal input also to Pin 14, connect the Output on Pin 4 to 3 and check the sound on the Pin 2, 13 or 1. |
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LeighKemp
Joined: May 29, 2009 Posts: 5 Location: Bristol
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Posted: Sat Jan 14, 2017 6:35 pm Post subject:
Worlds simplest Lunetta filter |
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I know this is an old thread but I've just got round to making this circuit. It's sounds great so I was just wondering if anybody has any mods for it. |
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gabbagabi
Joined: Nov 29, 2008 Posts: 651 Location: Berlin by n8
Audio files: 23
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Posted: Sun Jan 29, 2017 5:04 am Post subject:
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hello LeighKemp, which schemo u have used to build it? |
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LeighKemp
Joined: May 29, 2009 Posts: 5 Location: Bristol
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Posted: Wed Feb 01, 2017 2:18 pm Post subject:
Worlds simplest Lunetta filter |
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Hi I used to schematic right at the top of the page. |
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