Spin Semiconductor

Hello all -

The FV-1's Sx inputs are logic inputs and not an issue to connect to a micro-controller. The Pot inputs are voltage level sensing and are little harder to connect to a micro-controller. I see two options in connecting them to a micro. 1, use a DAC for each Pot input and the output voltage is used for each Pot input, or 2, use a digital pot as a voltage divider and feed the divided voltage into each Pot input of the FV-1.

One reason for wanting fully micro-controlled pot settings is for MIDI patches and saving those settings. My current project (not a pedal) is MIDI enabled and all analog parts of it use digital pots for audio levels and trigger settings. I'm thinking I should be consistent and use digital pots for the FV-1.

Has anyone created a fully micro-controlled FV-1 and how did you control the pot inputs?

Thanks!
Paul

I use PWM for controlling pots via uC. let me know if I can be helpful

Thanks!

Sweetalk wrote: ↑Fri Nov 26, 2021 2:57 pm I use PWM for controlling pots via uC. let me know if I can be helpful

So, are you using PWM to charge an external capacitor / resistor network or something like that then feeding that to the pot inputs to the FV-1?

Videosplicer wrote: ↑Sun Nov 28, 2021 1:16 pm

Sweetalk wrote: ↑Fri Nov 26, 2021 2:57 pm I use PWM for controlling pots via uC. let me know if I can be helpful

So, are you using PWM to charge an external capacitor / resistor network or something like that then feeding that to the pot inputs to the FV-1?

I feed the pot inputs of the FV1 after a low pass filter but done it directly with great results

The best way is to connect the 3 pots to the uC analogue inputs then PWM the uC output to the FV-1, if you use a 5v uC you will need to make sure the PWM output is converted for 3.3v.

EDIT - I see Sweetalk has suggested the same above.

Thank you both for your replies. The controller I'm using is a little outdated by today's standards (MCF5206E) and has no PWM I/O. Don't ask me why I'm using that CPU, I have other reasons, but at least it is 3.3V

Anyway, project is moving along fine and deciding if the next version will incorporate the FV-1 or if I will have an optional add-on module that uses the FV-1. I have other questions about the FV-1 and will post them under other threads.

Thank You!