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 Forum index » DIY Hardware and Software » Thomas Henry designs
X-4046 VCO Page is Up
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fonik



Joined: Jun 07, 2006
Posts: 3722
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PostPosted: Mon Nov 07, 2011 3:33 am    Post subject: Reply with quote  Mark this post and the followings unread

a short soundsample of my dual X-4046 VCO - thank you, thomas!
(sorry for the bad video quality, but i have been too lazy to install a proper light)


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Sonic



Joined: Dec 02, 2010
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PostPosted: Mon Nov 07, 2011 6:02 am    Post subject: Reply with quote  Mark this post and the followings unread

Lovely sounds Fonik. Can't wait to get mine up and running.
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Tim Servo



Joined: Jul 16, 2006
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PostPosted: Mon Nov 07, 2011 12:03 pm    Post subject: X-4046 VCO Page is Up Reply with quote  Mark this post and the followings unread

Nice work, Mattias!

What sort of tracking range are you getting from the 4046 VCOs?


Tim (should be working, but checking e-m.com) Servo
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Paradigm X



Joined: Feb 15, 2011
Posts: 276
Location: Null and void

PostPosted: Mon Nov 07, 2011 4:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

Sounds amazing!

Im definitely getting one or two of those on the next run.

Does that include the waveshaping things?

Excellent.!
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Wobuse



Joined: Dec 07, 2011
Posts: 26
Location: Lyons,il

PostPosted: Wed Dec 21, 2011 7:13 pm    Post subject: X-4046 confusion
Subject description: Anyone else notice this?
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Hey Spitfire...
Sorry to necro post but I see a problem on the PCB you etched,I know because I just made the same mistake. I think I should of flipped or reversed the artwork for this board,before I made it with Press N Peel.As it is now & just like your board pics I think the Chips are backwards & upside down; meaning you would have to intstall your chip sockets on the copper side of the PCB in order for the pinouts to work.Keep in mind that the square pad is pin one on the IC . Anyone else care to comment.
spitfire wrote:
Guys, I'm confused. I made PCB by myself, panel, everything as always. But I'm stuck on wiring. I see two J1, two J2, in schematic is writen to connect volt/octave to J1, but there's two of them on PCB, and also 1v/octave is writen there... I'm posting some pictures how my works look like. I hope you will help me. I don't want burn everything after such a nice working.

Posted Image, might have been reduced in size. Click Image to view fullscreen.


Posted Image, might have been reduced in size. Click Image to view fullscreen.


Posted Image, might have been reduced in size. Click Image to view fullscreen.


Posted Image, might have been reduced in size. Click Image to view fullscreen.


Posted Image, might have been reduced in size. Click Image to view fullscreen.
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ungleichklang



Joined: Dec 03, 2011
Posts: 70
Location: East-Belgium

PostPosted: Mon Jan 09, 2012 5:33 am    Post subject: Reply with quote  Mark this post and the followings unread

@Rykhaard
Is the 'error' on the PCB layout already fixed?? (10k res. in Sinesection @ TL074)

I would love to build one of those ...

EDIT: I'm a newbee to electronic-circuits, so don't beat me please .... but if I understand the sheets and the comments right, then the little error on the pcb-layout by rykhaard is this one see attachment??
(borrowed the layout from drapdap on page 3)


x4046-rework.png
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x4046-rework.png



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ungleichklang



Joined: Dec 03, 2011
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Location: East-Belgium

PostPosted: Thu Jan 12, 2012 7:11 am    Post subject: Reply with quote  Mark this post and the followings unread

a second newbee question on the original schematics ....

between leg2, leg 3 and leg 14 of the IC1 (4046) there is a XOR-GATE, is this something internal of the IC or do I miss a part ???
the PCB-Layout yust makes a bridge between legs 2 and 5, leg 14 goes to +15 and leg 3 goes to Q3 / R14 .....

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slacker



Joined: Nov 18, 2007
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PostPosted: Thu Jan 12, 2012 11:33 am    Post subject: Reply with quote  Mark this post and the followings unread

Yes, the XOR gate is part of the CD4046. Pins 14 and 3 are the inputs and 2 is the output.
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01012k7



Joined: Aug 31, 2013
Posts: 17
Location: England

PostPosted: Sun Sep 22, 2013 6:58 am    Post subject: Re: X-4046 confusion
Subject description: Anyone else notice this?
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Wobuse wrote:
Hey Spitfire...
Sorry to necro post but I see a problem on the PCB you etched,I know because I just made the same mistake. I think I should of flipped or reversed the artwork for this board,before I made it with Press N Peel.As it is now & just like your board pics I think the Chips are backwards & upside down; meaning you would have to intstall your chip sockets on the copper side of the PCB in order for the pinouts to work.Keep in mind that the square pad is pin one on the IC . Anyone else care to comment.
spitfire wrote:
Guys, I'm confused. I made PCB by myself, panel, everything as always. But I'm stuck on wiring. I see two J1, two J2, in schematic is writen to connect volt/octave to J1, but there's two of them on PCB, and also 1v/octave is writen there... I'm posting some pictures how my works look like. I hope you will help me. I don't want burn everything after such a nice working.

Posted Image, might have been reduced in size. Click Image to view fullscreen.


Posted Image, might have been reduced in size. Click Image to view fullscreen.


Posted Image, might have been reduced in size. Click Image to view fullscreen.


Posted Image, might have been reduced in size. Click Image to view fullscreen.


Posted Image, might have been reduced in size. Click Image to view fullscreen.
so is the board the right way on this picture ????
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Antichambre



Joined: Oct 14, 2013
Posts: 1
Location: France

PostPosted: Mon Oct 14, 2013 7:27 am    Post subject: x-4046 Reply with quote  Mark this post and the followings unread

Hi everyone,
My x-4046 is built and works perfectly.
I drive it in pitch with a 12bit DAC, no problem for this part, now i need to digitally control the rampoid skew, i can't use a DCP for that, cause this last accepts only positive signal less than 5v.
Who can help me?
TIA...
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elmegil



Joined: Mar 20, 2012
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PostPosted: Mon Oct 14, 2013 7:42 pm    Post subject: Reply with quote  Mark this post and the followings unread

Crazy idea, probably too expensive, but I think it could work with the right parts.

Back to back vactrols. Have a DAC driving the first, and that same voltage going through an inverter to the second, so when one is bright the other is dark and vice versa.

Issues that need to be checked out: appropriate resistance values (500k sum?), trimming so that they are roughly equal, response curve of the vactrols (roughly linear? is non-linear a problem?), does the light memory/slow response of the vactrols cause you any concerns?
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01012k7



Joined: Aug 31, 2013
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PostPosted: Tue Oct 15, 2013 4:13 pm    Post subject: Reply with quote  Mark this post and the followings unread

ok I made a second board as I think the first one I made was wrong I think A is right in the picture


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airfrankenstein



Joined: Jan 10, 2010
Posts: 40
Location: france

PostPosted: Sat Feb 08, 2014 4:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi,

Can someone verify my edit of the layout to see if it is correct?
I tried to take into account various revisions pointed out in the thread.


thomas_henry_4046_vco_122_pnp_114.pdf
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mrmrshoes



Joined: Feb 19, 2011
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PostPosted: Tue Feb 11, 2014 3:35 am    Post subject: Reply with quote  Mark this post and the followings unread

I've just built and tested my own pcb layout of this circuit and it works fine. I can give you the eagle files if you like.

They are a fair few jumpers, but that don't bother me like Wink


4046-vco.png
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airfrankenstein



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PostPosted: Tue Feb 11, 2014 4:34 am    Post subject: Reply with quote  Mark this post and the followings unread

great, looks nice!
Can you pm me the eagle files then?
no problem bout the jumpers.

btw any thought s about this one in relation to the 555 vcl by TH?
Hard to find opinions.
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mrmrshoes



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PostPosted: Tue Feb 11, 2014 6:43 am    Post subject: Reply with quote  Mark this post and the followings unread

No probs like

I've sent you a pm
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airfrankenstein



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PostPosted: Wed Feb 12, 2014 10:40 am    Post subject: Reply with quote  Mark this post and the followings unread

thanks!
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01012k7



Joined: Aug 31, 2013
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PostPosted: Wed Feb 12, 2014 3:57 pm    Post subject: Reply with quote  Mark this post and the followings unread

mrmrshoes wrote:
I've just built and tested my own pcb layout of this circuit and it works fine. I can give you the eagle files if you like.

They are a fair few jumpers, but that don't bother me like Wink
would it be possible to send me the eagle files too Smile
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airfrankenstein



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PostPosted: Wed Feb 12, 2014 4:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'm having a hard time finding demo clips of the 4046. Fonik has one or two and that's about it. What existing vco would it be comparable to?
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mrmrshoes



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PostPosted: Fri Feb 14, 2014 6:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

01012k7 - check you pm like.
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Designator



Joined: Jul 18, 2012
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PostPosted: Tue Mar 04, 2014 1:14 am    Post subject: Reply with quote  Mark this post and the followings unread

I'm interested in the Eagle files, too...
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inlifeindeath



Joined: Apr 02, 2010
Posts: 309
Location: Albuquerque, NM

PostPosted: Wed Mar 05, 2014 11:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

airfrankenstein wrote:
I'm having a hard time finding demo clips of the 4046. Fonik has one or two and that's about it. What existing vco would it be comparable to?


ive built 3 X-4046 VCOs and they're fantastic. Fonik offers great PCBs.
it has all the classic necessities of a VCO, but the added feature I love and end up using the most is the 'Skew' pot. It allows you to morph a Sawtooth wave into a Triangle and everything in between, with a single pot. Want to make this voltage controlled at some point.
in summary, BUILD IT!

http://youtu.be/qwR22vLTc_8

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fonik



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PostPosted: Thu Mar 06, 2014 1:00 am    Post subject: Reply with quote  Mark this post and the followings unread

inlifeindeath wrote:
...but the added feature I love and end up using the most is the 'Skew' pot. It allows you to morph a Sawtooth wave into a Triangle and everything in between, with a single pot. Want to make this voltage controlled at some point.

i put a x-pan/fader side by side with my x-4046 VCOs Very Happy

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mrmrshoes



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PostPosted: Thu Mar 06, 2014 10:41 am    Post subject: Reply with quote  Mark this post and the followings unread

I'll post the eagle files later on the night when i get home, so if anyone else is interested they can just jump in.
If any one has a problem with me uploading these files please just let me know and i'll take them down.

i've got an 555 VCO layout thats tried and tested by a fair few people. I'll post this in its own thread if they's any takers?
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mrmrshoes



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PostPosted: Thu Mar 06, 2014 7:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

You'll need to compare TH schematics to mine for pot names, values, the odd jumper and a wee bit of off board wiring. Should be pretty easy to figure out.

A quick overview

All red traces on the board are jumper wires.

The one air wire from the expo transistors to the LF442 is also a jumper wire. (solder pads have been provided)

All off board wiring use 2 or 3 pin 0.1 header connectors (I really recommend these)
http://www.esr.co.uk/electronics/products/frame_connectors_pcb.htm

I would use eagle when building. you can highlight a part/trace in the schematic editor (show object button) and it will show up in the board editor. (really useful, i use it all the time)

two VCO's can be transferred onto on 160mm x 100m copper clad board

the freeware version of eagle allows you to export images from these files. The board dimensions are bigger than the the freeware limitations so you won't be able to edit without the full version.

This is how you prepare the artwork for Press n Peel

http://gaussmarkov.net/wordpress/tools/software/eagle/creating-a-pcb-image-using-export/
http://www.cnczone.com/forums/general_electronics_discussion/33374-eagle_pcb_image_toner_transfer_lil_tutorial.html

These file are for personal use only.

feel free to tweek and mod, if you make them better please post them here.

anyway have fun and happy building.

Also if anyone has a problem with me posting these files please just let me know.
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