New Bergfotron module: The Woodwind VCO

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Bergfotron
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New Bergfotron module: The Woodwind VCO

Post by Bergfotron » Tue Oct 11, 2011 3:04 am

I just posted a new module on the Bergfotron site:
Bergfotron Woodwind VCO
This is in response to requests for a simpler module with the woodwind waveshaper, which also is a part of the Advanced VCO.
Feel free to use this thread if you have questions about the new module.

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andrewF
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Post by andrewF » Tue Oct 11, 2011 4:15 am

:party: thanks for putting up that page, very interesting reading

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Post by Bergfotron » Tue Oct 11, 2011 4:43 am

Thanks Andrew. A note to those who have already checked the page out: I have just corrected a few errors on it. Hopefully there are no more errors, but please report here if you find any.

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PF
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Post by PF » Tue Oct 11, 2011 6:49 am

Supercool.... :party:

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Luka
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Post by Luka » Tue Oct 11, 2011 11:51 am

very interesting - would love to build some of these when i get home

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megaohm
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Re: New Bergfotron module: The Woodwind VCO

Post by megaohm » Tue Oct 11, 2011 12:20 pm

Bergfotron wrote:I just posted a new module on the Bergfotron site:
Bergfotron Woodwind VCO
That is great!
I want to try the waveshaping ASAP.
Glad to see Bergfotron still running strong.
Your stuff (especially construction techniques!!!) have been a real inspiration to many of us.
Thanks.
www.MegaOhmAudio.com

Will work for pistachios

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mono-poly
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Post by mono-poly » Tue Oct 11, 2011 1:57 pm

That's great!
The farad is the captain of my print.

http://www.mono-poly.nl
http://www.noodlebar.org

WTB blue lantern purple vco

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roman_f
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Post by roman_f » Tue Oct 11, 2011 2:34 pm

thank you :) maybe you could also give us some simple panel layout to see that inputs and controls are possible

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Post by Bergfotron » Tue Oct 11, 2011 2:40 pm

roman_f wrote:thank you :) maybe you could also give us some simple panel layout to see that inputs and controls are possible
Well, the connector list at the end of each module page shows exactly what inputs, outputs and controls are possible. Just remember that each input in the list can have any number of summing inputs.

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Post by ultrashock » Tue Oct 11, 2011 5:50 pm

awesome new module!
would you be so kind to tell in what software are you drawing such beautiful schemes? they are really pleasant for reading instead of different Pcads ones!
AFIK, the boards layouts are just ordinary vector files from smth. like Corel Draw - was it all done manually, with all resistors color's decoding?

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Post by Bergfotron » Wed Oct 12, 2011 1:18 am

ultrashock wrote:awesome new module!
would you be so kind to tell in what software are you drawing such beautiful schemes? they are really pleasant for reading instead of different Pcads ones!
AFIK, the boards layouts are just ordinary vector files from smth. like Corel Draw - was it all done manually, with all resistors color's decoding?
You guessed it. Both schematics and circuit board layouts are done in Corel Draw. The schematic symbols are clones of the ones that good old Elektor magazine used.
I just switched to publish the schematics in PDF format. I will convert the schematics for all AMORE modules to PDF eventually.

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Post by lordofthebored » Wed Oct 12, 2011 11:29 am

I love the sound of this woodwind waveshaper circuit. Any chance that it (not the vco core) would run on 12v without any component changes?
thank you thank you thank you

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Post by Bergfotron » Wed Oct 12, 2011 1:26 pm

lordofthebored wrote:I love the sound of this woodwind waveshaper circuit. Any chance that it (not the vco core) would run on 12v without any component changes?
12V supply is a bit low for 10V CVs. You might have to redesign it for a lower CV range.

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mono-poly
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Post by mono-poly » Wed Oct 12, 2011 1:31 pm

Why all the -1 voltages on the pcb's?
Have to come up with a solution to fix that.
Still excited to get a woodwind vco done!
The farad is the captain of my print.

http://www.mono-poly.nl
http://www.noodlebar.org

WTB blue lantern purple vco

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Luka
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Post by Luka » Wed Oct 12, 2011 1:38 pm

doesn't look like -1 is connected to anything on this pcb

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Post by mono-poly » Wed Oct 12, 2011 1:43 pm

:doh: indeed

Just need the +15 and -15 :)
The farad is the captain of my print.

http://www.mono-poly.nl
http://www.noodlebar.org

WTB blue lantern purple vco

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Bergfotron
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Post by Bergfotron » Wed Oct 12, 2011 2:47 pm

Luka wrote:doesn't look like -1 is connected to anything on this pcb
It's used by the 4051 in the waveform selector.

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Post by Luka » Wed Oct 12, 2011 4:52 pm

Image

secret connections? :)

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Post by Luka » Wed Oct 12, 2011 5:05 pm

oh wait i found it :)

so it is ok just to use 2 resistor voltage divider from the -15 rail to generate the -1 or does it need to be regulated?

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Post by roman_f » Wed Oct 12, 2011 7:01 pm

is +10V necessary for this module? at my dotcom power system i have only +/-15V and +5V :/

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Bergfotron
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Post by Bergfotron » Thu Oct 13, 2011 1:24 am

Luka wrote:Image

secret connections? :)
Look at the circuit board layout PDF. The AMORE connector is obscuring the trace in the component placement plan.

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Post by Bergfotron » Thu Oct 13, 2011 1:29 am

roman_f wrote:is +10V necessary for this module? at my dotcom power system i have only +/-15V and +5V :/
Yes, in AMORE the 10 V supply is used for stuff that can affect the tuning plus it feeds all fixed CV potentiometers. On the WVCO, the 10 V supply is used by the VCO core, to increase tuning stability. This makes the tuning imune to load variations in the +15 V supply.

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mono-poly
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Post by mono-poly » Thu Oct 20, 2011 8:05 am

Is a component overlay with resistor values posible?
I'm having a real hard time translating codes.
The farad is the captain of my print.

http://www.mono-poly.nl
http://www.noodlebar.org

WTB blue lantern purple vco

Jarno
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Post by Jarno » Thu Oct 20, 2011 8:15 am

Haven't started myself, but +1, being colourblind doesn't help :-)

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Post by Bergfotron » Fri Oct 21, 2011 2:47 pm

mono-poly wrote:Is a component overlay with resistor values posible?
I'm having a real hard time translating codes.
I'm layouting the boards using the shown symbols for resistors etc, so unfortunately I don't have anything else.

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