Since everything that I am building is in Kosmo format I wanted to know if it is possible to easily convert this Barton DIY Quantizer to use 1/4" jacks instead of the 3.5mm jacks? Can you just switch them out or is it not that simple and there’s more that must be done in order to achieve this? The link to the PCB and documentation is here: https://modularaddict.com/manufacturer/barton/barton-userwritablequantizer
As always, thanks in advance for everyone’s help on this board! 
They are completely interchangeable, the only difference is their size.
That’s a nice looking quantizer, it’s on my “think about building this one” list!
If it were a design that had jacks mounted on the PCB it’d be a little bit more of an issue (but only a little) since the 1/4" jacks wouldn’t fit there and you’d have to run wires from the panel to the points on the board where the jacks were designed to be.
This design has all the jacks off-board, though, so no problem.
Note that the BOM calls for two mono jacks and two “NC switch jacks”, which are the ones with three terminals: ground, signal, and one that gets connected to signal when there is nothing plugged in (a normal connection). So you need to make sure your 1/4" jacks (or two of them at least) have that.
The pots are on-board, but could be moved off-board for a different panel design.
I’ve been looking at quantizers for a while now but the ones that I lean towards all seem to be SMT and I am not ready for that step yet. I like this one because though it doesn’t have pre-programmed scales, etc… it still gives the user the ability to create and save their own scales and it’s through hole.
@analogoutput I actually was going to post a follow-up question about those two “NC jacks.” Are those just simply switch jacks? or are they a type of switch jack? I haven’t been able to find anything except switched.
Now that you mention it all of those pots and switches are off board too so maybe I will create a kosmo sized panel along with the 1/4" jacks and redo the panel layout. This way everything remains in the kosmo sized format that everything else I have is in.
Yeah, I think you just need 1/4" switch jacks but maybe someone who’s used 1/4" jacks more than me should speak up.
I’m just getting going with SMT myself, just built one of these https://www.tindie.com/products/pmfoundations/eurorack-dual-ring-modulator-pcb-and-panel/ with low part count and 1206 (the largest common size for SMT passives) components. Not so bad. I advise a magnifying headset and good quality curved tweezers.
There’s an ~infinite (*) number of variants out there, but from context “NC switch” (=normally closed) is most likely variant III (J4) here:
*) image from this document that lists “39 common jacks,” and then points out that “many more combinations are possible.”
Synthcube has what looks like a decent part for $0.99, a little cheaper than Mouser https://synthcube.com/cart/synth-diy/parts/jacks/amphenol-1-4-phone-connector-jack
OMG…there are so many! @analogoutput can you show me the link you found on Mouser? I am not seeing one on there. I have to place a Mouser order this week so it might be worth paying a bit more since I will already be paying for shipping.
I usually find Tayda is so much cheaper than Mouser it’s worthwhile even if I have to go to elsewhere for a few parts (especially if you want to buy enough jacks for a bunch of modules all at once, note Synthcube has price breaks at 10 and 100) but… for the Mouser link, Google the part number and you find: https://www.mouser.com/ProductDetail/Amphenol-Audio/ACJM-MVS-2S?qs=t8%2F5FiDdxGYe0Rca1cnd1w%3D%3D
These are the jacks I normally use, but I can’t tell if these are the same as the ones in the Mouser link or no? Now that I know there are 39 different types!
