This is my take on the FV-1 multi effects chip, I’ve taken elements from the datasheet, Hagiwos version and a couple of other FV-1 designs I found on the web.
I’ve added a version of my programmer to it to control an 8 channel DAC and a pair of shift registers to generate 16 switched outputs.
Using 3 external eeproms I can select upto 32 variations of effects and then create 999 patches of these using the 3 variables pots and the wet/dry mix pot.
It is midi controlled as well with each parameter available as a CC. And patch recall over midi.
Stereo/mono inputs and stereo outputs.
Thinking of adding a foot switch option as well to enable/disable the effect.
gr8 to see your still at it, with the GAZA stuff going on the “issues” in your neck of the woods are taking second fiddle. standards news broadcasting, old war , old news…
Anyway never seen the fv-1 befor , but your work on stripboard is always inspiringly complex!
FV-1 was designed for guitar pedals. Probably the only IC ever designed specifically for guitar pedals. It is used in many, many guitar pedal designs. I have built 3 with it, a multi-mode reverb, a multi-mode delay, and a rainbow machine. Rainbow machine doesn’t even need the eeprom. It just uses the default program.
I didn’t realize that Hawigo’s multi effect module used the FV-1.
Also, pedalpcb sells a pcb (and has the schematics if you want to make your own) that is a programmer/development platform for the FV-1. It is based around guitar pedals, though. May still get you going in the right direction if you need a development platform.
I don’t need PCBs, this is a one off at the moment, although I do have 6 more fv-1 chips to play with. I might build some add on effects modules for some of my synth designs, currently they are either effect less or using stripped down Behringer june-60 devices.
Shamelessly stole Hagiwos method for displaying parameters and added the patchname/number, bank number/effect and the effects mix, a tight squeeze. I’m thinking of putting a large 3 digit LED next to the display so you can see the current patch number from a distance.
