Heh. I was going through old entries in this topic and came across this:
I’m now putting finishing touches on a clock module design that is Nano based and has one encoder and one push button, and an OLED.
Dumbass year-ago-me! Ignore him.
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This is one of my Rack modules I’d love to have a hardware version of, it’s very useful musically. I think it can be done just with a boost/attenuate. So it can output like:
Would also want a clock/tap sync as well, it doesn’t actually need screens, and rather than different wave form out, a single wave form out which can be shaped like
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Plus an offset, yeah. Not hard I’d think. The tricky thing is if you actually want the knobs to set the lower and upper limits, as opposed to the amplitude and offset. But thinking about it that might be just a couple op amps, one doing an average and the other a difference to convert limits to offset and amplitude.
I guess in a virtual module the screens are easy. In hardware, not so much, especially if it’s not a microcontroller based design.
What does the FM input do, how does it differ from frequency CV?
Do you know of an analog oscillator circuit that can do that? There’s a shape variable LFO by Kassutronics but it morphs a triangle into a ramp/sawtooth, not curved shapes. I guess a digital LFO could do that pretty easily.
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The tricky thing is if you actually want the knobs to set the lower and upper limits, as opposed to the amplitude and offset.
Yep, this is exactly the point, so you can precisely set the range of the LFO, not just attenuate it on the receiving side. Having the range to/from points CV controllable is also very useful.
I guess in a virtual module the screens are easy.
Some things are easy in software, hard in hardware. Others are hard in software, easy in hardware. Screens are the former. TBH I don’t remember the purpose of the FM input, I don’t use it and don’t see how it could be any different than the normal CV in. Not important.
I guess a digital LFO could do that pretty easily.
Yeah, this might have to be chucked overboard as well and replaced with just a triangle or whatever. I find swooshy/exponential triangly shapes are useful musically, but I’m trying to keep the modules in my boxes as free from microcontrollers as I can for power reasons.
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Thinking it over, I think the approach I’d use would be to make a separate module you could use with any LFO, or other inputs. Similar to O.B.A. but with low and high level knobs and CV inputs which are averaged and differenced to make offset and scale, the offset goes into a DC mixer with the input signal, whose output goes into a VCA controlled by the scale value. Maybe even a 4-quadrant multiplier so if the “To” level is below the “From” level it does inversion. (Though what Analog Devices calls a “Low Cost Analog Multiplier” sells for $13 in SMD or $17 in DIP at Mouser…)
Added: I see the AD633 has an offset pin. So you’d just have to take the limits and convert them to a scale and offset, and throw them at the AD633. Expensive chip but you’d hardly need anything else.
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I actually do also have a stand-alone version, which has both an in-map and out-map. However, I never use it, I only ever end up using the LFO version. It’s just a design choice, I ultimately prefer it built in.
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For a range LFO with multiple waveforms going to separate outputs, you’d need a separate offset and scale circuit for each waveform. That’d get complex and expensive. A single output with a switch to select the waveform would get around that, though.
Hm, I was once thinking about a module to convert 0–5 V / ±5 V / 0–10 V signals to one another. The above module generalizes that to converting any range to any range.
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Yeah, that’s what I was thinking. I was looking at the TAPLFO3 since it’s got different waveforms, tap, and wavemultiply, covers the basis of what I want except for the ranging. I don’t know if there are good PCB mount rotary switches though.
Actually if you didn’t need the input-range and assumed a standard range, you could have an input to the LFO module and a switch to bypass the internal LFO and just use the external signal. I like that kind of utility.
Is the inverted N in the label above the input jack intentional?
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Happy little accidents…
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Input level conversion between three standard ranges isn’t hard:
(Output has to go to a high impedance, e.g. + input on an op amp)
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I was looking at the price, €4.45, and wondering “what’s that in dollars? … Oh. Yeah.”
I think something like this works, if you have the euros for the AD633:
This assumes the IN range is 0 to 5 V, which is what the above resistor circuit gives you.
Added: Hmm, back to the drawing board, I think… if FROM_LEVEL is 0 V and TO_LEVEL is 10 V then Y1 comes out to 20 V, which ain’t happening. If FROM is -10 V and TO is 10 V then Y1 is 40 V. So maybe inputs need to be scaled down a factor of 4 and output back up a factor of 4, or something like that.
Added: Maybe like this:
The scale factor and offset are divided by 5, and then the result is multiplied by 5 again. If FROM = -10 and TO = -10 then Y1 is 8 V and XY/10 internally in the AD633 is in the range 0 to 4 V which is fine.
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That third one is straight up a butt wave
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cheeky
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I was just messing around with one of my favorite Euro modules, the 4MS quad clock distributor with the qcd expander.
And I got to thinking, what I would REALLY like to have in Kosmo is a module with an absolutely preposterous amount of voltage controlled clock divisers/multiplayers
…like 10 or 20… At least.
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Anyone know if any more drum modules are in the works or planned? Deciding if I should build just one (dual row) 80cm case, or if I should build a second while I’m at it.
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I dont know about real LMNC Drum modules but I converted four Barton Analog Drum modules to a single Kosmo format module.
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I have a Barton Analog Drum that I built , simple but good sounding drum for sure .
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COUGH COUGH bout time we see that there GAMEBOY SINGLE OSCILLATOR and GAMEBOY TRIPLE OSCILLATOR eh? 
OH and 123ADC… otherwise im just gonna make it in euro lolol
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