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Roland IR3109 filter in euro
MUFF WIGGLER Forum Index -> Music Tech DIY Goto page 1, 2  Next [all]
Author Roland IR3109 filter in euro
Modulart_JP
This is an adaptation for eurorack of the IR3109 filter board for Shruthi.



It features 2 audio ins (1 w/ attenuator), 2 CV ins (1 w/ attenuator), 1 CV in for the resonance and 2 outs.
This is a non commercial project but I made a run of PCBs for me and a bunch of friends, and I have some left over.
If interested, let me know.
I can provide a BOM and a FPE/Schaeffer file or a DXF for the front panel.
Keep in mind that you will need to source a IR3109 chip.
dot matrix madness
Modulart_JP wrote:
Keep in mind that you will need to source a IR3109 chip.

Wouldn't it make sense to design the board using two LM13700 and transistor pairs instead? hmmm.....
Modulart_JP
That's the SMR-4 filter and if I wanted that I would have made an adaptation of it.
The point was to make a filter around the IR3109 (since I have a bunch of them) and I did this.
That's all.
If it's of interest for some people, great.
If not, doesn't matter. thumbs up

For the record, I have all filters for Shruthi.
And despite what some say or want to believe, the SMR-4 and the IR3109 don't sound nor behave the same.
synthetek
Do you have PCBs available? I have a few IR3109
Luap
Modulart_JP wrote:
That's the SMR-4 filter and if I wanted that I would have made an adaptation of it.
The point was to make a filter around the IR3109 (since I have a bunch of them) and I did this.
That's all.
If it's of interest for some people, great.
If not, doesn't matter. thumbs up

For the record, I have all filters for Shruthi.
And despite what some say or want to believe, the SMR-4 and the IR3109 don't sound nor behave the same.


Agreed. I've got very nearly all the filter boards for the Shruthis.. SMR-4 is very nice, but it isn't quite the same as the IR3109 which I prefer. I built 5 or 6 IR3109 Shruthis! Definitely my favourite thumbs up

Incidentally, 1 or 2 people were working on clones of the IR3109 chip, although im not sure what became of them.
guest
i like my IR3109 filter board as well. im working with somone on a clone of the IR3109. its almost there, but the sound isnt quite right yet.
Modulart_JP
guest wrote:
i like my IR3109 filter board as well. im working with somone on a clone of the IR3109. its almost there, but the sound isnt quite right yet.

Wow ! Very interesting !
applause
oldenjon
guest wrote:
i like my IR3109 filter board as well. im working with somone on a clone of the IR3109. its almost there, but the sound isnt quite right yet.

Exciting News
axolotl
Modulart_JP wrote:

For the record, I have all filters for Shruthi.
And despite what some say or want to believe, the SMR-4 and the IR3109 don't sound nor behave the same.


yeah! i thought it was weird that so many people act like the Shruthi SMR-4 has anything to do w/ Roland when it's more just "inspired by" or aiming to be the same
Modulart_JP
Here we go...
For those interested, the PCB is available for sale in my shop.
https://www.pharmasonic.jp/shop/index.php?id_category=18&controller=ca tegory

Price is 1,700 JPY (about 15 USD/ 13 EUR) including free shipping worldwide.

Modular Addict seems to have IR3109 chips:
https://modularaddict.com/parts/synth-diy-parts/ir3109-parts

I'll upload DXF and FPD files very soon for the front panel.
oldenjon
Modulart_JP wrote:


I'll upload DXF and FPD files very soon for the front panel.

What about the gerbers or preferably eagle files?
Boogie
Modulart_JP
Quote:
13 EUR) including free shipping worldwide.
how do you do that ?
WHich transport company ? or just your local postoffice going worldwide ?
rosch
Thanks for this project! Looking forward to building them.
I butchered a boss effect back in Shruthi-1 times.
There is a big difference between this filter sound and the SMR4.
Looking forward for guest's version too!
applause
scriberius
d'naab from analogue renaissance is also working on an IR3019 clone

http://www.analoguerenaissance.com/AR3109/
god1983
Very cool ! thumbs up SlayerBadger!
Modulart_JP
Here is the BOM:
https://www.pharmasonic.jp/download/IR3109_BOM.pdf

For the 4x 220p capacitors, you can experiment with other types like Polystyrene, Polypropylene or Polyester.

Here is the file for a Schaeffer/FPE panel:
https://www.pharmasonic.jp/download/IR3109.fpd

Of course, you are free to modify it.

And the DXF file for a DIY panel:
https://www.pharmasonic.jp/download/IR3109.dxf

I built a few modules for me and some friends.
I have 6 PCBs left from the batch I ordered and I will keep 1 as spare.
Therefore there are 5 PCBs available to go.
Since 3 are already sold, only 2 remains available.
In the future, if there is a reliable clone of the IR3109 chips on the market at a reasonable price, I might offer it as a commercial project.
LektroiD
Just ordered mine.
Modulart_JP
thumbs up
Then only one left...
Modulart_JP
Did anyone build the filter already ?
Any feedback would be appreciated.
As well as pictures of your build.
Here is the one I built for myself:

(sorry, the picture is not very good)
rosch
Not yet, I just ordered 2 panels from Schaeffer today.
B0bcat
Time to put the module up on Modulargrid :-D
belzrebuth
Any chance for a re-run?
I wonder how I missed this woah
LektroiD
Modulart_JP wrote:
Did anyone build the filter already ?


I would like to, but it's not arrived yet. It's been over a month since I made the order. What's the expected shipping time?
Modulart_JP
zombie
If I am correct, you ordered your PCB on November 19th and I shipped it on the 20th.
You should have received an email notification the same day.
The PCB should have arrived by now.
Please contact me privately via my shop.
(and remind me your order reference)
LektroiD
Modulart_JP wrote:
zombie
If I am correct, you ordered your PCB on November 19th and I shipped it on the 20th.
You should have received an email notification the same day.
The PCB should have arrived by now.
Please contact me privately via my shop.
(and remind me your order reference)


Messaged via website smile
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