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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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diablojoy
Joined: Sep 07, 2008 Posts: 809 Location: melbourne australia
Audio files: 11
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Posted: Sun Sep 23, 2012 12:10 am Post subject:
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sounds good Hex
as usual i think i will want one.
You might need to slow down some , my cave is filling up fast . There's now over 200 boards in my backlog damn never enough time
Wish i could take a sabatical for a year or two and just build.
Oh well i always said this would last me till retirement to finish if i was lucky. _________________ In an infinite universe one might very well
ask where the hell am I
oh yeah thats right the land of OZ
as good an answer as any |
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JingleJoe
Joined: Nov 10, 2011 Posts: 878 Location: Lancashire, England
Audio files: 14
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Posted: Sun Sep 23, 2012 3:20 am Post subject:
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Please Sir, may I have some circuit diagram? _________________ As a mad scientist I am ruled by the dictum of science: "I could be wrong about this but lets find out"
Green Dungeon Alchemist Laboratories |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Sun Sep 23, 2012 6:56 am Post subject:
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JingleJoe wrote: | Please Sir, may I have some circuit diagram? |
No circuit diagram until it is done, sorry There are some evil people out there that will snap this up and make it into a commercial module if they think it's worth it. _________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! Last edited by HexInverter on Sun Sep 23, 2012 6:57 am; edited 1 time in total |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Sun Sep 23, 2012 6:57 am Post subject:
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diablojoy wrote: | sounds good Hex
as usual i think i will want one.
You might need to slow down some , my cave is filling up fast . There's now over 200 boards in my backlog damn never enough time
Wish i could take a sabatical for a year or two and just build.
Oh well i always said this would last me till retirement to finish if i was lucky. |
200!? lol!!! That is a massive backlog xD
That would be a fun year or two! _________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Sun Sep 23, 2012 9:30 am Post subject:
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Beta PCB layout complete Dimensions are 60x93mm.
It might not be until next weekend that I can prototype it Gotta go work on school stuff now...
_________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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JingleJoe
Joined: Nov 10, 2011 Posts: 878 Location: Lancashire, England
Audio files: 14
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Posted: Sun Sep 23, 2012 11:40 am Post subject:
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I understand about the schematics, keep them secret, could you clarify one thing for me though: Is there a PIC or other programmable IC in it? _________________ As a mad scientist I am ruled by the dictum of science: "I could be wrong about this but lets find out"
Green Dungeon Alchemist Laboratories |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Sun Sep 23, 2012 1:36 pm Post subject:
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JingleJoe wrote: | I understand about the schematics, keep them secret, could you clarify one thing for me though: Is there a PIC or other programmable IC in it? |
Nopers! It is all discrete logic chips (CMOS) and analogue opamps! _________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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JingleJoe
Joined: Nov 10, 2011 Posts: 878 Location: Lancashire, England
Audio files: 14
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Posted: Tue Sep 25, 2012 5:28 am Post subject:
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Oh excellent I like that, for reasons of longevity. _________________ As a mad scientist I am ruled by the dictum of science: "I could be wrong about this but lets find out"
Green Dungeon Alchemist Laboratories |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Tue Sep 25, 2012 5:32 am Post subject:
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JingleJoe wrote: | Oh excellent I like that, for reasons of longevity. |
Indeed sir! There are other benefits too -- there is no aliasing on the CV input When you sweep the CV input knob, or feed a CV signal in, it is actually changing the clock (and thus, the pitch) in real time, in increments of one clock cycle (not aliased like with a microcontroller!)
Also, I am quite certain a microcontroller has different rise/fall times that effect the sound of the noise. I was comparing a similar noise routine I wrote on PIC to this CMOS circuit and they don't sound the same! _________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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JingleJoe
Joined: Nov 10, 2011 Posts: 878 Location: Lancashire, England
Audio files: 14
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Posted: Tue Sep 25, 2012 6:42 am Post subject:
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Better sound; Jolly good but could you define aliasing? I may know it by another name ... _________________ As a mad scientist I am ruled by the dictum of science: "I could be wrong about this but lets find out"
Green Dungeon Alchemist Laboratories |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Tue Sep 25, 2012 6:50 am Post subject:
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JingleJoe wrote: | Better sound; Jolly good but could you define aliasing? I may know it by another name ... |
Aliasing is the "stepping" that occurs when reading (or generating) any analogue signal with a digital device (in this case, a microcontroller). Basically, the ADC (analogue -> digital converter) on a microcontroller is typically 1024 (10 bit) step resolution, so, as you turn the CV knob on a digital device, or input a control voltage, the device actually only has 1024 steps on the control.
This may sound like a lot, but it IS actually noticeable to the ear when you are talking about a VCO. You typically can hear faint stepping in the pitch coming out of digital VCOs that only use the built-in 10bit ADC. Of course, you can purchase and use a 12bit ADC to greatly increase the resolution you can read at, but, it's nowhere near as cheap. Already, you've probably surpassed the cost of the two (only) decently expensive parts on the non-microcontroller CMOS design...the two CD4006/NTE4006s _________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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JingleJoe
Joined: Nov 10, 2011 Posts: 878 Location: Lancashire, England
Audio files: 14
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Posted: Thu Sep 27, 2012 11:43 am Post subject:
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I see now all of the science has been explained, thankyou. Your circuit is really quite good then if it is making digital noise without aliasing, carry on the good work old sport _________________ As a mad scientist I am ruled by the dictum of science: "I could be wrong about this but lets find out"
Green Dungeon Alchemist Laboratories |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Thu Sep 27, 2012 11:44 am Post subject:
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JingleJoe wrote: | I see now all of the science has been explained, thankyou. Your circuit is really quite good then if it is making digital noise without aliasing, carry on the good work old sport |
Haha, thanks for your kind words. I am happy to explain anything as far as I am capable of _________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Thu Sep 27, 2012 1:29 pm Post subject:
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Euro panel rendering!
_________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Thu Sep 27, 2012 1:29 pm Post subject:
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MU Panel Rendering:
_________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Thu Oct 18, 2012 6:06 am Post subject:
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Well, beta PCBs for vcNOIZ shall be ordered very soon, alongside the NeinOhNein Rimshot!
_________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Fri Nov 23, 2012 5:36 pm Post subject:
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vcNOIZ is now in preorder phase to help fund a production run!
The module is prototyped and is good to go! Woot!
You can preorder here: http://igg.me/p/282076?a=227451 _________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Sat Nov 24, 2012 12:42 pm Post subject:
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NOTE: The Bill of Materials and Mouser Cart has changed! I had to make some corrections to the BoM.
You will need to add another 100k resistor. The new BoM and Mouser Cart reflect this change. _________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Sun Nov 25, 2012 6:09 pm Post subject:
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Here's the SMT circuit board rendering. Should be ready for the fab house now!
_________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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SPIKE the Percussionist
Joined: Jun 06, 2006 Posts: 74 Location: manipulate.net
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Posted: Sun Nov 25, 2012 6:42 pm Post subject:
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sounds NEAT!!!
more like the noiz of a 2600 than a C64 to me though! _________________
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[[more noiz!]]
SPIKE the Percussionist
- http://www.manipulate.net -
ASTROGENIC HALLUCINAUTING
CoRE - Troupe Music Director
DOGGEBI
morgue city |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Sun Nov 25, 2012 6:56 pm Post subject:
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SPIKE the Percussionist wrote: | sounds NEAT!!!
more like the noiz of a 2600 than a C64 to me though! |
Haha! Well, whatever works for ya _________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Taylor
Joined: Jul 13, 2006 Posts: 170 Location: us
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Posted: Wed Dec 05, 2012 8:15 am Post subject:
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Very cool sounds and lovely PCB design. Wish I could afford the Eurorack boards as it looks like fun. Any chance you'd offer the PCBs without the SMT already mounted, for those of us comfortable with SMT soldering? _________________ musicpcb.com |
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