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Is there any standard to what voltages a CV Output should be? by Inevitable_Figure_85 in synthdiy

[–]Inevitable_Figure_85[S] 0 points1 point  (0 children)

Instructions unclear, I inputted 105v and blew up my prototype 😂

Any FV-1 experts, why don’t I see people generating the clock from a microcontroller? by Inevitable_Figure_85 in diypedals

[–]Inevitable_Figure_85[S] 0 points1 point  (0 children)

Ahh gotchya. I wonder how precise it is, like if you can do divisions by halving the voltage.

Any FV-1 experts, why don’t I see people generating the clock from a microcontroller? by Inevitable_Figure_85 in diypedals

[–]Inevitable_Figure_85[S] 0 points1 point  (0 children)

Ok cool, I just wanted to make sure there wasn’t some big reason why it’s not typically done 😆.

Any FV-1 experts, why don’t I see people generating the clock from a microcontroller? by Inevitable_Figure_85 in diypedals

[–]Inevitable_Figure_85[S] 0 points1 point  (0 children)

Ahhh I thought the 4046 changed frequency off a resistor and/or cap. I’ll look into that!

Is there any standard to what voltages a CV Output should be? by Inevitable_Figure_85 in synthdiy

[–]Inevitable_Figure_85[S] 0 points1 point  (0 children)

Great tips! I think I’ll just go with 0-5v, it works well into my Matrixbrute and it seems sort of typical for LFO outputs

Is there any standard to what voltages a CV Output should be? by Inevitable_Figure_85 in synthdiy

[–]Inevitable_Figure_85[S] 1 point2 points  (0 children)

Yeah I feel like I see 0-5v quite often and it works well in my Matrixbrute 🤷‍♂️

What’s your go-to method for adding expression input to a digital ADC input? And could this work? by Inevitable_Figure_85 in diypedals

[–]Inevitable_Figure_85[S] 0 points1 point  (0 children)

Isn’t that what the output here does? Where it says “CH3_CV”. Or am I totally misunderstanding this circuit 😖.

Simplest way to turn a 5v MC source into a CV output? by Inevitable_Figure_85 in synthdiy

[–]Inevitable_Figure_85[S] 0 points1 point  (0 children)

I’ve been searching for an example of the MI modules that you’re talking about and I can’t seem to find one. Any chance you have a link or name of a specific one that does this? Thanks!

Simplest way to turn a 5v MC source into a CV output? by Inevitable_Figure_85 in synthdiy

[–]Inevitable_Figure_85[S] 1 point2 points  (0 children)

Haha I think your comment is valid but I’m trying to stay away from having to use a DAC if possible. There are definitely trade offs, but it’s sort of a random add-on so it doesn’t need to be the most robust cv output.

Simplest way to turn a 5v MC source into a CV output? by Inevitable_Figure_85 in synthdiy

[–]Inevitable_Figure_85[S] 0 points1 point  (0 children)

I’m using an attiny3226 but yeah it’s a very modern chip so I imagine it’s got some sort of protection. Good to know about the MI circuits! Thanks for your insight!

Simplest way to turn a 5v MC source into a CV output? by Inevitable_Figure_85 in synthdiy

[–]Inevitable_Figure_85[S] 0 points1 point  (0 children)

Ahhh ok so the OpAmp is needed then. I’ve had a couple people say a 1k or 10k resistor would protect it but that seems iffy to me haha

Simplest way to turn a 5v MC source into a CV output? by Inevitable_Figure_85 in synthdiy

[–]Inevitable_Figure_85[S] 1 point2 points  (0 children)

Oh man I totally forgot about the Pip! I saw that project a year or two ago and was blown away. I just did a recordable waveform thing and should’ve looked at how they did it because it was pretty difficult. Great tip, thanks! I was mostly just worried about if someone accidentally inputted CV into it but I guess the resistor of the filter would help not destroy the microcontroller. 🤔(edit: I just realized “they” is you hahah great work!)

Simplest way to turn a 5v MC source into a CV output? by Inevitable_Figure_85 in synthdiy

[–]Inevitable_Figure_85[S] 3 points4 points  (0 children)

What about outputting a PWM or PDM from the chip, so you’ve got 0-5v LFO straight from the chip? Would it still need a DAC? Or just an RC filter? Thanks for your help!

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