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Vactrol chiptune squarewave osc (w/ audio and schematic) |
Tombola
Ultra Wiggler
Joined: 23 Jan 2011
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Location: London, England
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 Posted: Wed May 04, 2011 4:24 pm Post subject: Vactrol chiptune squarewave osc (w/ audio and schematic) |
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13 components, based on hex schmitt trigger, lives up to its name.
Will post schem and audio...
Last edited by Tombola on Thu May 05, 2011 8:50 am; edited 2 times in total |
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J3RK
Super Deluxe Wiggler
Joined: 22 Dec 2009
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Location: Seattle
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| Posted: Wed May 04, 2011 4:41 pm Post subject: |
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| I'd love to see these! |
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gde
anti-zarzutzki
Joined: 05 Jan 2009
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| Posted: Wed May 04, 2011 5:19 pm Post subject: |
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it has an interesting proximity to the quantizer....
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falafelbiels
still learning to wiggle
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Location: Rotterdamm son
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| Posted: Thu May 05, 2011 3:09 am Post subject: |
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| Audio or it just barely exists... |
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falafelbiels
still learning to wiggle
Joined: 04 Aug 2009
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Location: Rotterdamm son
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| Posted: Thu May 05, 2011 3:11 am Post subject: Re: Vactrol chiptune squarewave osc |
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| Tombola wrote: |
Will post schem and audio... |
| falafelbiels wrote: | | Audio or it just barely exists... |
Whoops, sorry bout that.....
patience is not a virtue of mine so much that I don't take the time to read on these here forums. I just watch the pretty pictures and shout a lot. |
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Jarno
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Location: Rosmalen, NL
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| Posted: Thu May 05, 2011 4:29 am Post subject: |
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| falafelbiels wrote: | | ...and shout a lot. |
Confirming the public opinion on people from your particular city.  |
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falafelbiels
still learning to wiggle
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Location: Rotterdamm son
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| Posted: Thu May 05, 2011 4:50 am Post subject: |
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| FEYENOORD! HOOLIGANS! |
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Pfurmel
Super Deluxe Wiggler
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Location: Ireland
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| Posted: Thu May 05, 2011 5:25 am Post subject: |
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This looks very promising indeed
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Tombola
Ultra Wiggler
Joined: 23 Jan 2011
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Location: London, England
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| Posted: Thu May 05, 2011 5:44 am Post subject: |
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| gde wrote: | | it has an interesting proximity to the quantizer.... |
It definitely DOESN'T track 1v/oct! |
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Tombola
Ultra Wiggler
Joined: 23 Jan 2011
Last Visit: 18 May 2013
Posts: 891
Location: London, England
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| Posted: Thu May 05, 2011 6:15 am Post subject: |
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Here's the schematic and a pic, including very chic black electrical tape vactrol. It has one LED and two LDRs. I used different brands of LDR to make the second osc track differently from the first.
In this rather poor demo, the first sound is a good oscillator (RS-95e) to give an idea of the random CV going into the osc. It then switches to the bad oscillator. The notes explain what's going on
http://soundcloud.com/musicthing/bad-osc-test
[s]http://soundcloud.com/musicthing/bad-osc-test[/s]
DIY vactrol oscillator by Tom.Whitwell, on Flickr
Last edited by Tombola on Thu May 05, 2011 10:23 am; edited 2 times in total |
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falafelbiels
still learning to wiggle
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Location: Rotterdamm son
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| Posted: Thu May 05, 2011 8:25 am Post subject: |
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Very... Cool...
Even without audio... |
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iopop
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| Posted: Thu May 05, 2011 9:01 am Post subject: |
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Lovely!
Thanx for posting the schema. |
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CLee
Veteran Wiggler
Joined: 05 Apr 2010
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Location: Chicago
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| Posted: Thu May 05, 2011 9:50 am Post subject: |
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very cool. I'm just starting to mess around with Vactrols... they are very strange beasts indeed.
I don't know if I'm totally following what the switch does.
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Tombola
Ultra Wiggler
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Location: London, England
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| Posted: Thu May 05, 2011 10:11 am Post subject: |
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| CLee wrote: | | I don't know if I'm totally following what the switch does. |
The 40106 is six squarewave oscs in a chip. I'm using two, each tuned by a separate LDR. One LED shines on both LDRs.
One osc goes to the output, via resistor.
The second osc goes to the switch. Three possible states are:
OFF - only the first osc sounds
Down - the second osc goes to the output via a resistor, so is essentially mixed with the first osc. You hear two distinct tones.
Up - the second osc goes to the output via a diode, which means it influences the first osc in strange ring-mod ish ways. At low frequencies, it sort of pulses the other osc on and off.
I should really build a version with all six oscs going and a big bank of switches. |
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Pfurmel
Super Deluxe Wiggler
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Location: Ireland
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| Posted: Thu May 05, 2011 10:18 am Post subject: |
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I can't wait to hear this thing, cool design.
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http://boxemissions.tumblr.com/
http://sioraigeimhreadh.bandcamp.com/
| bf wrote: |
Some fart in an office on the other side of the country who's hobbies include golf and passive-aggressive spousal abuse likely won't understand my obsession with unicorn penis. |
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falafelbiels
still learning to wiggle
Joined: 04 Aug 2009
Last Visit: 18 May 2013
Posts: 2679
Location: Rotterdamm son
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| Posted: Thu May 05, 2011 10:35 am Post subject: |
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And with audio still very cool... It's a cool thing! Great project for next Monday's soldering workshop, thanks man  |
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Rod Serling Fan Club
aquatic hitchhiker
Joined: 14 Dec 2009
Last Visit: 18 May 2013
Posts: 3429
Location: Germany
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| Posted: Thu May 05, 2011 10:45 am Post subject: |
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| Tombola wrote: |
I should really build a version with all six oscs going and a big bank of switches. |
That could be interesting. Something similar to the Cloud Generator with spread for each osc (if possible?) but in lo-fi square wave form could be a very fun noise maker.
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Jarno
Ultra Wiggler
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Location: Rosmalen, NL
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| Posted: Thu May 05, 2011 11:30 am Post subject: |
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| falafelbiels wrote: | | FEYENOORD! HOOLIGANS! |
ROFL! |
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SMS303
Tha BABELFISH Wiggler...
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fengland
Common Wiggler
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| Posted: Mon May 09, 2011 3:25 pm Post subject: |
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| I like the slew on the pitch change. sweet. |
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