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WIGGLING 'LITE' IN GUEST MODE

The AI004 is out, a DIY-able tribute to the MS20 filter
MUFF WIGGLER Forum Index -> Music Tech DIY  
Author The AI004 is out, a DIY-able tribute to the MS20 filter
abelovesfun


I realized I forgot to post this here - oops! The AI004 is in stock at aisynthesis.com and at synthcube and thonk, and shortly at modular addict and other fine retailers.



The AI004 is a loving tribute to the late MS-20 filter (the OTA version, not the korg 35 version in early models) with high pass and low pass modes. The design started with a modernization of the design by Sagitronics, with a gain boost by me, and others, and is now available as a standard built module, or as a kit or pcb/panel set for only $25.

As with all my kits, schematics are free, there is a step by step build guide with pictures (video coming soon), no wiring, and it can be built in an hour or two. Happy building!

For more details, see: https://aisynthesis.com/product/diy-ms-20-filter/
funkytransport
good work on this - great design and easy to follow build guide!
Will try and post a video of it in use shortly..
applause
elpas0
abelovesfun
Thanks for great building materials, was super easy to build!
Love that self-oscilating resonance, still cannot choose between reasonable/crazy tuning:)
thetwlo
nice! I always preferred this version! Had both MS20's and the OTA was sounded much more brutal!
ZargZorg
Hey,
I would like to try this build and I'm already ordering something from Mouser.
Is there a Mouser project for this?
ZargZorg
The 68k resistor (R19) link on the AI004 OTA build guide isn't working or it's not available.
Could anyone confirm if any of these resistor work fine as a replacement, I'm not experienced at al in DIY.

https://www.taydaelectronics.com/79833-dup-r-12-4-ohm-1-8w-1-metal-fil m-resistor.html\
https://www.taydaelectronics.com/resistor-68k-ohm-1-4w-1-metal-film-pk g-of-10.html

Thanks
unauthorised-service
ZargZorg wrote:
The 68k resistor (R19) link on the AI004 OTA build guide isn't working or it's not available.
Could anyone confirm if any of these resistor work fine as a replacement, I'm not experienced at al in DIY.

https://www.taydaelectronics.com/79833-dup-r-12-4-ohm-1-8w-1-metal-fil m-resistor.html\
https://www.taydaelectronics.com/resistor-68k-ohm-1-4w-1-metal-film-pk g-of-10.html

Thanks


1/4 watt yes
abelovesfun
This is the correct resistor: https://www.taydaelectronics.com/resistor-68k-ohm-1-4w-1-metal-film-pk g-of-10.html.

That link used to work. I'll contact Tayda to see if they do redirects/get more info, I'll also update the link on my page.
devinw1
https://www.taydaelectronics.com/resistors/1-4w-metal-film-resistors/r esistor-68k-ohm-1-4w-1-metal-film-pkg-of-10.html


Looks like they just moved things into sub folders.

thumbs up
widdly
Is there a schematic?

edit: found it here.. https://aisynthesis.com/wp-content/uploads/2018/02/AI004-VCF-V1.pdf
abelovesfun
Yep, free schematics always! It's an education company that makes money by selling kits and pcbs, but the knowledge is always freely available.
electricanada
I bought one of these but never got it working. The switch was such a tight fit in the pcb that it broke when I tried to place it.
abelovesfun
electricanada wrote:
I bought one of these but never got it working. The switch was such a tight fit in the pcb that it broke when I tried to place it.


You're always welcome to reach out via the site for support.
electricanada
Thanks Abe. Once I get around to sourcing a replacement switch, I will try filing the legs down so they fit in the pcb. It’s so close to being done, but I’m lacking the switch.
abelovesfun
electricanada wrote:
Thanks Abe. Once I get around to sourcing a replacement switch, I will try filing the legs down so they fit in the pcb. It’s so close to being done, but I’m lacking the switch.


Send me an email via aisynthesis.com/contact with your address and I'll see what I can do about sending you a new one. You shouldn't need to file it down. It is tight, but I'm using the manufacturer's footprint, so it's the right one, but you are correct, it is tight.
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