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Post by NightMachines on Feb 2, 2020 20:53:00 GMT
I‘ve been playing with some Ciat Lonbarde gear recently, namely the Cocoquantus, Sidrax, Plumbutter and Rollz-5, and I noticed that Peter Blasser has also released some circuit designs publicly. Richard Brewster, aka Pugix, has turned the Rollz-5 ones into improved schematic drawings on his website: pugix.com/synth/rollz-5-schematics/I would like to try out the 2-Roll circuit in AE Modular form (i.e. running on 5V) and also check out versions with more Rolls, like 4 or 6. The Rolls are chaotic trigger pattern generators which can be self-patched. Even numbers of Rolls produce slow triggers (different capacitor values produce different timings), whereas uneven amounts create ultrasonic oscillations, for which there is also an ultrasound “filter” circuit. Like most of Peter’s instruments, the Rollz-5 is a very chaotic thing and rightly titled “Drum and Drama Machine”. It’s the predecessor of the Plumbutter. I hope I’ll find some time soon to breadboard a buch of Rolls. I’ll let you know how it goes. I plan to omit the LED driver part of the schematic. The “nodes” in the drawing above are patch points for self-patching, whereas the out is a proper trigger output. Feel free to chime in and experiment with Peter B’s designs in AE Modular land as well
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Post by NightMachines on Feb 2, 2020 22:06:01 GMT
Okay, I ran some quick simulations in iCircuit and with 5V it seems to behave just as chaotic as with 9V I sketched two 4-Roll circuits, the left using 4.7uF caps and the right one 1uF caps. The yellow scope trace shows the left 4-Roll output and green shows the right one. Nodes are not connected. I also added diode clamping circuits before the outputs because the scopes showed short negative voltage spikes too. Don’t know if those are real or just iCircuit glitching though. Here’s the same circuit but with some nodes connected (patched together): The scope traces become more fun now and there is even an audio rate portion in the green one at the end of the gate!
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Post by NightMachines on Feb 2, 2020 22:40:29 GMT
One last chaotic pattern with patched nodes before bedtime
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Post by young Protoboard on Feb 2, 2020 23:15:32 GMT
I have not tested this, but this struck me on my first perusal of the diagram. Seems like the 470k resistors feeding each capacitor form the RC pathway for charging; replacing the fixed values with pots may provide some knob control. How much and of what character, I'm not sure, but would be an interesting experiment.
I love seeing bare-bones component module designs like this!
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Lugia
Wiki Editors
Ridiculously busy...ish.
Posts: 556
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Post by Lugia on Feb 3, 2020 3:52:34 GMT
Bonkers! So, does the elimination of the LED driver stage cause any difference in behavior over Peter B's original design? Might be nice to have a tiny Rollz-based module alongside everything else for trigger pandemonium...
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Post by NightMachines on Feb 3, 2020 13:47:12 GMT
I have not tested this, but this struck me on my first perusal of the diagram. Seems like the 470k resistors feeding each capacitor form the RC pathway for charging; replacing the fixed values with pots may provide some knob control. How much and of what character, I'm not sure, but would be an interesting experiment. I love seeing bare-bones component module designs like this! Good thinking! The Plumbutter actually has a frequency pot for each full 3- and 4-Rolls circuit (so one pot for all 3 or 4 rolls together). I’ll investigate how this is achieved. Bonkers! So, does the elimination of the LED driver stage cause any difference in behavior over Peter B's original design? Might be nice to have a tiny Rollz-based module alongside everything else for trigger pandemonium... The LED driver is by Ken Stone and was added to the circuit by Richard Brewster, so there’s no LED in the original Rollz-5 circuit. However, on the Plumbutter there are LEDs. I don’t think it would change the behavior of the device.
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persy
New Member
Posts: 24
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Post by persy on Feb 14, 2020 3:16:57 GMT
i have the original Fourses and Fyrall kits from a long time ago that never got built. love peter b's stuff. would be nice to see some of his circuits in AE form.
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