Rollz-5+ Kit from Meng Qi (2014 Revision 3)

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SPIKE the Percussionist
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Post by SPIKE the Percussionist » Thu Oct 19, 2017 3:20 pm

will there be more available?
:despair:
++

more noiz!

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Post by jimmie » Fri Nov 03, 2017 8:31 pm

I've just got a second-hand Rollz5, pcb rev3. Went thru this thread prior so some of the things are sort of expected.. but wow this will take some time to get used to. Plumbutter feels an instrument but this I feel like a lab experiment device :lol:

I'm not sure everything is working as expected. Starve thing seems suspicious.
So, a few questions if somebody can help me..

- is there any way to control volume of each generator? (gongs too quite compare to others)
- gong's delay knob doesn't seem to work for all gongs
- gong's one trimmer for the pitch, what's for the other?
- do I expect to hear sound when I connect odd rolz to ultrasound?
- some people made a drone noise (or avdog?) how's that possible?
- what kind of sound effect do you expect from starve function? mine crackles when I turn CW a bit and all the sound is gone except faint noise on the background, so I think it's fried.


help appreciated!

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Post by jimmie » Fri Nov 10, 2017 7:24 am

hmm... does anybody know what are knobs and trimmers of a gong?

Of 4 gongs of mine, only has effect of "decay" for one knob, another one does nothing... And one trimmer sets the pitch but the other is mystery..

It doesn't looking like it's broken but kind of feel like got a lemeon :ripbanana:

Aside from that, I'm so hooked to this beast. Despite almost no control compare to PB2, the sound this device makes (well, mostly ultrasound) so unpredictable and never can achieve with PB2. I'm not a big fan of ultrasound of PB2 and but now I know what's the big deal about it with rollz5. Volume knob is so wanted!

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darmklacht@gmail.com
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Post by darmklacht@gmail.com » Tue Nov 21, 2017 5:48 pm

Is it time for another batch?
It would be for me! Hit me up If you have a PCB left.

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paperwork
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Post by paperwork » Tue Nov 21, 2017 9:06 pm

MQ sez on Instagram "rollz-5 PCB shipping to @modularaddict tomorrow" a few days ago (

You can sign up for email notification on the modularaddict page - https://modularaddict.com/mengqi-rollz5-pcb

:sb:

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darmklacht@gmail.com
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Post by darmklacht@gmail.com » Wed Nov 22, 2017 7:52 am

cool thanks!

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SPIKE the Percussionist
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Post by SPIKE the Percussionist » Tue Nov 28, 2017 5:20 pm

paperwork wrote:MQ sez on Instagram "rollz-5 PCB shipping to @modularaddict tomorrow" a few days ago (

You can sign up for email notification on the modularaddict page - https://modularaddict.com/mengqi-rollz5-pcb

:sb:
YASSS!!!

grabbed one of these noiz weapon kits yesterday!
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more noiz!

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salocinnomis
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Post by salocinnomis » Thu Nov 30, 2017 2:55 am

Got one too!
I was a bit surprised by the price bump, weren't they 35$ before?
Anyway I can't wait to build it, already have nearly all the components at hand (I was gonna build it on paper) , it's gonna be a fun holyday project!
///

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Post by jimmie » Thu Nov 30, 2017 11:49 am

What revision is that? Is there something done on power starve part?

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salocinnomis
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Post by salocinnomis » Sun Dec 17, 2017 1:35 pm

jimmie wrote:What revision is that? Is there something done on power starve part?
Should be the 4th Revision (or 5th?), it's just marked 2017 on the board.
I just received mine, power starve is gone on this revision.
All the hairy caps for the Rollz can be socketed (with 2x3 Pin headers), and all components except pots, nanas & rollz caps are on the back side (which is too bad for the trimmers..).
The matte black board looks amazing, especially with the gold tube bananas! I'm wondering how i'll house it.. a drilling template could be very useful indeed.
///

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Clemdu
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Post by Clemdu » Fri Dec 22, 2017 12:27 am

Hello!

Just wondering, all the pots should be linear?

Thanks !

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Clemdu
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Post by Clemdu » Sun Dec 24, 2017 1:15 pm

Alright, I went ahead with linear pots.

Also in my hunt for uninsulated bananas, I found this:
http://www.ebay.fr/itm/142428947529

20$ for 50 jacks, sounds like a pretty sweet deal to me, I'll report when I get them.

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Post by slope_generator » Sat Jan 20, 2018 2:21 pm

jimmie wrote: All the hairy caps for the Rollz can be socketed (with 2x3 Pin headers), and all components except pots, nanas & rollz caps are on the back side (which is too bad for the trimmers..).
I bought one of the new PCBs, and I don't really understand how the hairy caps can be "socketed" with the 2x3 pin header. Could you explain this or send a picture of yours? I understand the concept that different capacitors will yield different results, I just don't get how to connect them to the banana outlets/pin header.

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Post by jimmie » Sun Jan 21, 2018 1:02 pm

slope_generator wrote:
jimmie wrote: All the hairy caps for the Rollz can be socketed (with 2x3 Pin headers), and all components except pots, nanas & rollz caps are on the back side (which is too bad for the trimmers..).
I bought one of the new PCBs, and I don't really understand how the hairy caps can be "socketed" with the 2x3 pin header. Could you explain this or send a picture of yours? I understand the concept that different capacitors will yield different results, I just don't get how to connect them to the banana outlets/pin header.
oh sorry it's not 2x3 pin header, it's single pin sockets. one like in the pic of oljud's post (look for page 7 of this thread)

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Post by slope_generator » Tue Jan 23, 2018 2:21 pm

Something like this? I'm assuming you could just cut one up and use it that way, and just plug one into the positive jack and one into the opposite end. I'm just assuming there, because I'm confused why there would be the option for a 2x3 header if you just need to connection points for the capacitor.
Also as a more basic question, Meng Qi says that you need to solder the gold banana jacks to the PCB, but it doesn't seem like there's any connection points for them. Does anyone know where/how the new jacks are supposed to be soldered in?

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Clemdu
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Post by Clemdu » Tue Jan 30, 2018 12:09 pm

Hey,


I believe there's a 2x3 connection footprint for the hairy caps to easily fit different sizes of capacitors. it doesn't matter in which hole of one row you solder your capacitor leg, as the traces are like this:
Rollz-5 hairy capacitor footprint wrote:o-o-o
o-o-o
Also, I received the uninsulated bananas, they look good and 0.66$ (shipped to Canada) each is a pretty good price in my books.
Image

And did someone experiment with the hairy cap of the Ultrasound filters? The paper circuits mention that lowering its value "add damping effect to the filter" (slope steepness kind of thing?). I'm wondering if I'm going to socket that one as well. I guess I'll try different values and report here :sb:

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lcf
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Post by lcf » Tue Feb 06, 2018 8:28 pm

That would be cool to get a CAD file or something with pots placement.
I mean they are PCB mounted and that would be pretty hard to mesure it.

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Clemdu
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Post by Clemdu » Sat Feb 10, 2018 8:03 pm

Meng Qi just posted it on his website :wink:

Here it is in the manual section

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lcf
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Post by lcf » Sat Feb 17, 2018 6:46 pm

If somebody make cases or a design for Ponoko please contact me.
I tried but I don't have enough skills to achieve it.

BOM has changed too... Compile it from the PCB is a new experience for me ^^

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rmro
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Post by rmro » Wed Feb 21, 2018 9:53 am

I just picked up a rev3 Rollz second hand.

I was trying to figure out how you get the power starve to work, any ideas?

Also there's a banana input at the bottom in between the gongs, does anyone know what this is used for?

:tu:

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rmro
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Post by rmro » Wed Feb 21, 2018 10:04 am

...also on this image the there seems to be some colour coding, but is this actually relevant to any functionality?

https://images.reverb.com/image/upload/ ... ml8p96.jpg[/img]

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Clemdu
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Post by Clemdu » Sat Mar 03, 2018 8:06 pm

Hello!

What's the issue with your power starve?
I believe that center banana is ground.
The color coding is mostly important for the rollz, to tell them appart.

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lcf
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Post by lcf » Sun Mar 04, 2018 8:24 am

Anybody managed to compile a BOM please?
I started by eye but I always loose my count.
A PCB scan would be helpfull too but I don't have a scanner.

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rmro
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Post by rmro » Sat Mar 10, 2018 5:08 am

Clemdu wrote:Hello!

What's the issue with your power starve?
I believe that center banana is ground.
The color coding is mostly important for the rollz, to tell them appart.
Hi, the issue with the power starve I've since learnt is that the potentiometer is missing or has been removed but the vactrol is in place.

If someone could send me a link to a potentiometer I could order and try soldering myself that would be great. Also...as a complete neophyte with with soldering any other hints :tu: . Thanks

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Post by breadman » Sat Mar 17, 2018 3:45 pm

For anyone keeping track, the differences I've noticed in this most recent layout are:

1. bananas, pots and hairy caps now on the opposite side as the rest of components
2. 4x 1M pots instead of 1x
3. No vactrol power starve
4. LED power indicator added

Am I missing anything?
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