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mosc
Site Admin
Joined: Jan 31, 2003 Posts: 18195 Location: Durham, NC
Audio files: 211
G2 patch files: 60
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Posted: Tue Nov 20, 2007 8:05 pm Post subject:
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Rykhaard wrote: |
On further note - given more thought earlier today, once I've successfully breadboarded Ian's for testing - I'm going to go with a dual version, ALONG with a 633 RM in the same panel. I bought 3 of the chips earlier this year. Figured it'd be a cool combination along with 2 of Ian's. (Full patching availability for mixes / etc.) |
Good thinking... That will be a nice module. _________________ --Howard
my music and other stuff |
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Rykhaard
Joined: Sep 02, 2007 Posts: 1290 Location: Canada
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Posted: Wed Nov 21, 2007 8:47 am Post subject:
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mosc wrote: | Rykhaard wrote: |
On further note - given more thought earlier today, once I've successfully breadboarded Ian's for testing - I'm going to go with a dual version, ALONG with a 633 RM in the same panel. I bought 3 of the chips earlier this year. Figured it'd be a cool combination along with 2 of Ian's. (Full patching availability for mixes / etc.) |
Good thinking... That will be a nice module. |
Thanks much Howard! I'd originally thought of doing a triple ring mod. and that's why I'd ordered 3 of them. Now though, with Ian's great posting, I thought it to be cooler possibilities with 2 of his and 1 AD633 RM.
Always looking for ways to twist things. |
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EdisonRex
Site Admin
Joined: Mar 07, 2007 Posts: 4579 Location: London, UK
Audio files: 172
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Posted: Mon Dec 03, 2007 2:31 pm Post subject:
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So, I think I'm going to build a stripboard of this. It's tiny and will fit with minimal fuss in a rack panel with my SN-Voice pair. It really doesn't sound like anything else I have, it's cool and edgy. _________________ Garret: It's so retro.
EGM: What does retro mean to you?
Parker: Like, old and outdated.
Home,My Studio,and another view |
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Funky40
Joined: Sep 24, 2005 Posts: 875 Location: Swiss
Audio files: 1
G2 patch files: 5
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Posted: Mon Dec 03, 2007 3:21 pm Post subject:
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btw.:
i have drawn a little pcb layout with Print mounted sockets and pot for Eurorack format. ( would also fit into a frac custom panel )
But it is without the CV input.
is that necessary ?
if anybody is interested for that _untested_ layout and _without_ the Cv input,
i can post it.
It is made with sprint layout 5 for which a read only version is free available at abacom
i will draw it with the CV input later.
On the actual layout there was no space to integrate it for fast
( the goal was the printmounting for the pot and the sockets because of fast building and much less errors )
ahh, it has 2 out sockets and one is with bypass switch ( that should also fit for a printmount switch )
ohh, and it has power connecters for Motm, Dotcom and doepfer. |
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EdisonRex
Site Admin
Joined: Mar 07, 2007 Posts: 4579 Location: London, UK
Audio files: 172
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Posted: Mon Dec 03, 2007 3:26 pm Post subject:
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I think you should post it.
_________________ Garret: It's so retro.
EGM: What does retro mean to you?
Parker: Like, old and outdated.
Home,My Studio,and another view |
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Funky40
Joined: Sep 24, 2005 Posts: 875 Location: Swiss
Audio files: 1
G2 patch files: 5
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Posted: Mon Dec 03, 2007 4:13 pm Post subject:
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ok, comments are in the file window
as sayed: absolutely untested.
Print it first out and check the circuit AND the spacings.
I will give it another look later ( maybe in January )
I'm into other projects now, and my frined who is etching for me has no time now.
this draw was just a spontaneous action
here is the link to the free viewer software from abacom:
http://www.abacom-online.de/uk/html/sprint-layout.html
if the CV input is necessary i will redraw it then with that
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screenshot of my drawing you find in the RAR file |
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268.15 KB |
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This image has been reduced to fit the page. Click on it to enlarge. |
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My drawing is absolutely untested. Also the spacing for the Cliff minijacks, and the spacing for the print switch for bypassing. the link to the free viewer software is above |
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XORanalog, postet at EM.rar |
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15.84 KB |
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637 Time(s) |
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Terrafractyl
Joined: Sep 21, 2010 Posts: 13 Location: Melbourne
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Posted: Sat Jan 08, 2011 8:24 pm Post subject:
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Escuse my Noob schematic Question here but I stumbled across this circuit and really want to put one together.
My question is regarding the shape pot(?) in the top right of the schematic.
Does this mean the wiper of the shape pot is wired to the + 12 rail and the Input is wired to the ground??
very confused.
and regarding the power symbols generally.... When they point up does this mean the positive rail and downward pointing symbols represent the -12 rail?
any clarification would be greatly appreciated, just when i thought I'd gotten the hang of reading simple schematics, it seems there are many ways and symbols for similar things |
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frijitz
Joined: May 04, 2007 Posts: 1734 Location: NM USA
Audio files: 54
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Posted: Sat Jan 08, 2011 10:17 pm Post subject:
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Terrafractyl wrote: | Does this mean the wiper of the shape pot is wired to the + 12 rail and the Input is wired to the ground?? |
Ah, it means that the wiper is connected to one end of the pot thus forming a variable resistor. Afraid I don't remember which end. Try each and see which you like best.
Quote: | and regarding the power symbols generally.... When they point up does this mean the positive rail and downward pointing symbols represent the -12 rail? |
Yes, that's the convention I use. It's quite common but not universal. Also the connections of the opamps to the power supplies are not shown when they are obvious.
Quote: | any clarification would be greatly appreciated, just when i thought I'd gotten the hang of reading simple schematics, it seems there are many ways and symbols for similar things |
Yep, that's true. But after a while you will get the hang of the various notations and you won't even have to think about them.
Ian |
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drapdap
Joined: Oct 11, 2004 Posts: 204 Location: London
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frijitz
Joined: May 04, 2007 Posts: 1734 Location: NM USA
Audio files: 54
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Posted: Sun Jan 09, 2011 10:51 am Post subject:
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Yes, I saw Roman's pulser some time ago. Very clever!
Ken's XOR works quite differently from mine. Would be fun to compare them side by side.
Ian |
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Terrafractyl
Joined: Sep 21, 2010 Posts: 13 Location: Melbourne
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Posted: Sun Jan 09, 2011 2:51 pm Post subject:
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Thanks for the help!!! |
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drapdap
Joined: Oct 11, 2004 Posts: 204 Location: London
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frijitz
Joined: May 04, 2007 Posts: 1734 Location: NM USA
Audio files: 54
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Posted: Tue Mar 06, 2012 3:21 am Post subject:
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No, no. Elvis is the king! |
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drapdap
Joined: Oct 11, 2004 Posts: 204 Location: London
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Posted: Tue Mar 06, 2012 3:35 am Post subject:
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frijitz wrote: | No, no. Elvis is the king! |
but he's dead i'm afraid! so that leaves us You!
i need to decouple right? you didn't draw it on the schematic, as it's obvious for those in the royal family? |
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drapdap
Joined: Oct 11, 2004 Posts: 204 Location: London
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drapdap
Joined: Oct 11, 2004 Posts: 204 Location: London
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G2 patch files: 1
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indigoid
Joined: Apr 20, 2016 Posts: 5 Location: Sydney, Australia
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Posted: Sat Jul 02, 2016 9:46 pm Post subject:
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So I did my own little PCB layout for this and built it as a 4hp Eurorack module. Works very nicely! No audio samples to share, but I'm rather enjoying feeding it audio rate pulse waves from my dual VCO, with an AR envelope prodding the mod input occasionally. I have nine unpopulated PCBs left, so will definitely build a couple more.
In the below pic it's the module with the bamboo panel. It's obscured by a patch cable but I put Ian's name on the panel
Thanks for sharing, Ian! |
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cyclic
Joined: Mar 15, 2015 Posts: 95 Location: hobart
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Posted: Wed Jul 06, 2016 12:39 am Post subject:
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indigoid wrote: | I have nine unpopulated PCBs left, so will definitely build a couple more.
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Interested in sharing any around? I can donate to you or to ian!
cheers
Lance |
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deltamodulator
Joined: May 18, 2016 Posts: 91 Location: Texas, USA
Audio files: 2
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deltamodulator
Joined: May 18, 2016 Posts: 91 Location: Texas, USA
Audio files: 2
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Posted: Wed Jul 06, 2016 2:27 pm Post subject:
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Actually, if this is correct - that a neural net XOR (two hidden layers usually and just a few neurons) transfer function makes cool sounds - then would it not be uber cool to make a panel with a neural net XOR all done in variable resistors so you could tweak the weights during a performance? Neat?
Les |
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deltamodulator
Joined: May 18, 2016 Posts: 91 Location: Texas, USA
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deltamodulator
Joined: May 18, 2016 Posts: 91 Location: Texas, USA
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Posted: Wed Jul 06, 2016 3:11 pm Post subject:
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In the attached photo I am showing three "finger potentiometers", suitable for panel designs, that are a bit of a misnomer as they are in fact variable resistors not potentiometers so really I need a better name. Anyway here is how they work:
Each finger pot has an underlying spiral of a colorful (in this case aqua translucent) insulating material. On top of this is 3D printed an electrically conducting layer that makes for 10 kOHm or higher resistance in the coils. Both ends of the dual spiral design have a circular electrical contact suitable for 3mm hardware or similar. With washers and spacers, even a metal panel can be used. The mechanical and electrical contact is made at these end points.
Once situated firmly in a panel, the operator can vary the electrical resistance between the terminals by pushing on the center of the spiral, squeezing the sides of the spiral, or some other deformation on the spiral. The goal is to short the layers and then slide along the shorted layers or short more layers, etc. to create a different resistance.
I have also thought of using the zig-zag resistor symbol to physically make resistors this way, isn't that neat? Well anyway you get the idea. This circuit, using a single quad opamp and 3D printed resistors, and three audio jacks would make for a great demo item, don't you think?
Les
Description: |
Three "finger potentiometers" |
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indigoid
Joined: Apr 20, 2016 Posts: 5 Location: Sydney, Australia
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Posted: Tue Jul 19, 2016 4:39 pm Post subject:
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EL BO wrote: | indigoid wrote: | I have nine unpopulated PCBs left, so will definitely build a couple more.
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Interested in sharing any around? I can donate to you or to ian!
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It would be inappropriate to send me a donation for Ian's work. But very happy to pop some PCBs in the post. PM your postal address
Note the below parts are required, though:
* Lumberg 1503_12 right-angle 3.5mm jacks (Element14/Farnell have these)
* 9mm right-angle pots (I buy these locally in a bricks + mortar shop, but you can also get them from Thonk) |
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prgdeltablues
Joined: Sep 25, 2006 Posts: 222 Location: UK
Audio files: 12
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Posted: Fri Sep 02, 2016 8:18 am Post subject:
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Just built a dual one of these, and used the two spare op amps to make a third XOR, which is hard-wired to the outputs of the first two. In other words, you have A1 XOR A2, B1 XOR B2, and A XOR B available as outputs. To add to the sonic mayhem, the third also has an Input, so is actually a 3-input XOR.
Audio sample attached. First 20s are one output with two sine waves as input, tuned to be fairly harmonic slightly modulated by an LFO. Then two triangle waves, not harmonically related, VCOs driven by a sequencer. At 40s, it's the A XOR B XOR C output, run through a low-pass filter, with the cutoff driven by an LFO. Finally, at 1.34, it's a medley of all outputs through a mixer.
Very nice little circuit, thanks Ian
Peter
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XOR.mp3 |
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wackelpeter
Joined: May 05, 2013 Posts: 461 Location: germany
Audio files: 10
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Posted: Fri Sep 02, 2016 12:40 pm Post subject:
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Love the sound of the 3rd part... the first part is also very nice... Makes me think it's time to include one of these in my setup... _________________ https://soundcloud.com/bastian-j |
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