KVR Audio

whyterabbyt · Post by **whyterabbyt** » Tue Jun 27, 2017 8:59 am

Im trying to work out a stripboard layout, and the parts list/build instructions dont quite match the schematic - the values of the ceramic caps dont match, but its not clear whether one has been changed or both. (they're numbered on the BOM, but not on the schematic and there's no PCB layout).

I suspect C1 is the one that's changed, to 330nF; it connects between pin 6 of the attiny and a non-wiper leg of what I believe is the volume pot, if that helps.

vegaron · Post by **vegaron** » Tue Jun 27, 2017 11:57 am

I would have loved to see the schematics but Google does not know this word.
Is your post for real? 'Cause you know... KVR...

whyterabbyt · Post by **whyterabbyt** » Tue Jun 27, 2017 12:04 pm

vegaron wrote:I would have loved to see the schematics but Google does not know this word.

Funny, I use a version of Google that's capable of suggesting an alternative when there's a typo.

http://www.moffenzeefmodular.com/msg/

Is your post for real? 'Cause you know... KVR...

Realer than yours. 'Cause you know... KVR DIY forum....

vegaron · Post by **vegaron** » Tue Jun 27, 2017 12:28 pm

Google didn't suggest anything. Only four hits from your post here. I was not joking or trolling.

I think the cap at pin 5 is the one, which might have changed OR is wrong on the BOM. The cap at pin 6 is an electrolyte capacitor.

There are only two ceramic caps and the one across 4 and 8 is most definitively 100nF (VCC – GND). So I'm pretty sure the concerning cap is at pin 5. But I can't tell what its value should be. But I would try both. There should be no danger resulting from this spot.

knockman · Post by **knockman** » Tue Jun 27, 2017 1:10 pm

I believe vegaron is correct. Although they use those 'fancy' all black PCB which make examining the traces near impossible, checking the full resolution images you can see that C1 connects to pin 5 which is consistent with the schematic as a decoupling cap.

https://raw.githubusercontent.com/moffe ... ep%206.JPG

whyterabbyt · Post by **whyterabbyt** » Tue Jun 27, 2017 1:29 pm

Ah, C5 is actually what I changed. Cant type for shit today it seems. Cheers.

moffenzeef · Post by **moffenzeef** » Tue Jul 11, 2017 4:16 pm

AUTO-ADMIN: Non-MP3, WAV, OGG, SoundCloud, YouTube, Vimeo, Twitter and Facebook links in this post have been protected automatically. Once the member reaches 5 posts the links will function as normal.

Hey! Ross here from Moffenzeef. The 330nf ceramic cap is used to debounce the switch located in the top left hand corner of the board. The value isn't very critical and I believe I shipped some kits with different values. The schematic reads 100nf for that cap rather than 330nf and that is an error on my end, I apologize for that. 330nf is preferred, but anything close will do the job just fine. That cap doesn't need to be polarized. If you have any issues please feel free to contact us at moffenzeefmodular@gmail.com (mailto:moffenzeefmodular@gmail.com). Please send us photos of your build when it is complete!

Thanks for having enough interest in our product to do this!

-Ross

moffenzeef · Post by **moffenzeef** » Tue Jul 11, 2017 4:18 pm

Oh also, you were correct in assuming it was C1.

C1 = 330nf
C5 = 100nf

justin3am · Post by **justin3am** » Fri Jul 14, 2017 2:34 am

Hi Ross, welcome to KVR. Thanks for chiming in.

Checking out the moffenzeef Github now. Looks like a great resource!

whyterabbyt · Post by **whyterabbyt** » Fri Jul 14, 2017 9:57 am

oops, I missed this. Many thanks for posting, Ross, very much appreciated.

moffenzeef · Post by **moffenzeef** » Fri Jul 14, 2017 10:35 pm

No sweat! Stay in touch! We've got another DIY kit coming out in the next month or so that will be right up your alley

moffenzeef · Post by **moffenzeef** » Fri Jul 14, 2017 10:39 pm

justin3am wrote:Hi Ross, welcome to KVR. Thanks for chiming in.
Checking out the moffenzeef Github now. Looks like a great resource!

Thank you! We try really hard to go over the top with documentation for DIY. I got all of my fundamental education in electronics and synthesis through DIY kits like this and eventually got in touch with people who could teach me how to make my own stuff and learn some of these topics in depth.

We're trying to provide easily digestible resources to encourage people to make their own stuff from the ground up and show them that it's not as scary as older dinosaur engineers will lead you to believe. I am by no means an expert or even a qualified electronics engineer and I want people to know that you don't have to be to make the things you want to make.

Anyone got or built a Moffenzeef MSG?