Sunday, 8 April 2018

FV-1 Pedal

BuGG from Pedalpcb.com has created an EZ FV-1 module for vero layouts.
It is available here: http://www.pedalpcb.com/product/ezfv1.
This is what he wrote about this circuit in our Forum / Requests section (schematic available there):

"This is a fairly straightforward single-algorithm FV-1 circuit, it would be a nice starting point for learning how to work with the FV-1.
For easy stripboard building the PedalPCB EZ FV-1 module is available, a through-hole FV-1 module for stripboard/breadboard layouts.  (ready to use, no SMD soldering required)
The pin spacing is standard 0.1" x 0.6" so it can be handled like a standard PDIP-28 (WIDE) IC.  

The 24LC23A must be loaded with an algorithm in bank 0, although multiple switchable programs are possible by pulling pins 16, 17, and 18 high (corresponding to the binary encoded bank number).
The internal algorithms can also be used by grounding pin 13.
There will be pre-programmed EEPROMs available soon for those who just want to build the thing and not fool around with programming as well."


... and a more "experimental" version:

23 comments:

  1. Ok, this is cool. I don't know this chip but I get it. What a cool platform for experimenting with roll your own effects.

    Any idea how the built in Chorus Flange & Reverb sound?

    If pin 13 had a toggle on it to select internal or external programs and there was a 3 bank dip switch for 16, 17, 18 for selecting the binary numbers of the banks, this would be awesome for experimenting with the internal programs and experimenting with roll your own effects.

    I'm a few projects behind but this looks like it could be super flexible.

    Cheers,
    Andrew

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    Replies
    1. Added a version with switches.

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    2. Thanks for that. I will be building this one.

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  2. Built a PedalPCB Octagon with FV-1 and the effects are amazing and flawless.

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  3. Nice layout.

    I built on of the octagon pedals .It's real nice. I added a rotary plus expression jack and can control the 3 control pots independently with an expression jack.

    Here's what I did.
    Control 1-2 to A on rotary
    Control 2-2 to B on rotary
    Control 3-3 to C on rorary

    Lug 2 of pot 1 to 1,3 and 4 on rotary.
    Lug 2 of pot 2 to 5,6 and 8 on rotary
    Lug 2 of pot 3 to 9,10 and 11 on rotary

    Pin 2, 7 and 12 to middle lug of expression jack.

    Take the 3v3 from lug 3 of the nearest pot to one of the outer lugs of the expression jack. Take ground from pin 1 from from same pot to other outer expression lug.

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    1. Oops. Meant control 3-2 not 3-3 to rotary.

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  4. i think that few resistors and jumpers can be mooved under fv1 board and it will save couple of rows wide :)

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    Replies
    1. I prefer a comfortable, realistic space between components.

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  5. To be honest.. . I started building DIY effects to avoid digital mulieffects. Learning to mod, combine and improve analog devices is such great fun, unlike rebuilding digital chip-based ready units. But it's just me.

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    1. The FV1 is a little different... You aren't limited to a handful of predesigned effects like some of the other digital modules over the years. Using the SpinASM language (or the visual SpinCAD tool) you can craft your own completely new effects, some that wouldn't be reasonable in the analog world.

      Want multiple delay paths feeding back into one another with each going through it's own independent effect? Maybe a bitcrushed "infinite" reverb with a resonant filter on the wet path? Or how about a pitch shifter that shifts up and down two octaves at the same time while applying varied envelope controlled modulation to each side?

      All it takes is one of the layouts above and a little code...

      Then there's the fact that you can treat the FV1 like an analog component, there are two inputs and two outputs for all sorts of routing/feedback options...

      The control inputs don't have to be connected to pots... You can use an external LFO, an LDR, or even a PIC/AVR/Arduino microcontroller.

      There is a lot more fun to be had than just rebuilding precanned effects.

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  6. Oh..my...

    Looks like I'm placing an order soon

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  7. Just ordered three PCBs! Very cool stuff!

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  8. The ThreeVerb on PedalPCB is pretty tasty. Super easy build even with the FV-1.

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    Replies
    1. maybe you have some demos of it? i cant find any of them

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  9. Guys if you don't have the coding skills and want to play with a preprogrammed FV-1, uk-electronic in europe has some chips and some accessories (like a rotary encoder for switching the banks): http://uk-electronic.de/onlineshop/advanced_search_result.php?keywords=fv-1&search_in_description=1&x=0&y=0

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  10. I recently put a reverb pcb and FV-1 kit order on the PedalPCB website. Extremely reasonable prices and shipping. Can't wait to build it.

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  11. That module for selecting programs with the built in rotary switch is just great!

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  12. Verified the experimental version. Used the only coded chip i have which is for the Octagon MultiFX from PedalPCB. It works quite well considering its not designed for it. Just get delay or reverb/tremelo effect. The DIP switch gives more subtle changes which i'm not to sure of yet. Thanks for the layout Alex.

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  13. I recently put a reverb pcb and FV-1 kit order on the PedalPCB website. Extremely reasonable prices and shipping. Can't wait to build it.

    3D Design

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  14. Pre=programmed EEPROM's available right now at PedalPCB!

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