New mini xoxbox in development

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abzmuff
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Post by abzmuff » Sun Mar 03, 2019 6:24 pm

has anyone purchased a full kit or panel from synthcube recently? it's listed as out of stock, and i'm not sure if i should wait patiently for the crowd supply kit (shipping March 21?).

https://synthcube.com/cart/open-music-labs-x0x-heart
https://www.crowdsupply.com/open-music- ... t-eurorack

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synthcube
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Post by synthcube » Fri Mar 08, 2019 8:06 am

we are hoping to have our restock completed within a week or so thanks!

bugmenot
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Post by bugmenot » Tue Sep 24, 2019 7:49 am

There is a mouser cart (or another supplier) with the full x0xheart BOM in the cart? (or a BOM with mouser links)

Thanks in advance for posting that if anybody has it.

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Post by guest » Tue Sep 24, 2019 11:17 am

there isnt a mouser cart for the x0xheart, but there is one for the pacemaker. there is a BOM for the x0xheart, but it doesnt have links to suppliers.
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bugmenot
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Post by bugmenot » Wed Sep 25, 2019 6:38 am

A mouser cart with the x0xheart components would truly be appreciated. Or at least a BOM that has all the manufacturer part numbers.

Anybody have one of those handy? Thanks in advance.

bugmenot
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Post by bugmenot » Sun Nov 03, 2019 10:15 am

guest wrote:looks like i wont have to make the pocket-x0x anymore:
http://synthwise.com/acidlab-coming-out ... 2014/03/26

someone else is doing that already.
That didn't happen. So thanks in advance for COMPLETING that minix0x.

That would seemingly make A LOT of people happy and also finally eliminate any bassbot drama from the scene. (scammer cy and technology transplant having basically had somebody convert the x0xb0x board and schematics to SMT years ago without sharing the SMT schematics, board files, and gerbers with the open source community)

Again, thanks in advance for completing that minix0x and posting it!

bugmenot
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Post by bugmenot » Mon Nov 11, 2019 6:03 am

There is a more commonly available alternative to the PMP4201Y and the PMP5201Y that has same pinout? Thanks in advance!

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Altitude909
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Post by Altitude909 » Mon Nov 11, 2019 7:27 am

bugmenot wrote:There is a more commonly available alternative to the PMP4201Y and the PMP5201Y that has same pinout? Thanks in advance!
That's the rub, the BCM and other parts have a different pinout. The PMP has the weird one. I've built BA662 clowns with the BCM parts and they work so they should be OK here too but you'll need to rework the board.

Check if there is a smaller size for the PMP parts, with the BCM the middle size and the tiny size can be used on the same pads

bugmenot
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Post by bugmenot » Mon Nov 11, 2019 8:09 am

Altitude909 wrote:
bugmenot wrote:There is a more commonly available alternative to the PMP4201Y and the PMP5201Y that has same pinout? Thanks in advance!
That's the rub, the BCM and other parts have a different pinout. The PMP has the weird one. I've built BA662 clowns with the BCM parts and they work so they should be OK here too but you'll need to rework the board.

Check if there is a smaller size for the PMP parts, with the BCM the middle size and the tiny size can be used on the same pads
Oh, it's the guy I wanted to ask about where the CNC files are for the aluminum x0xb0x casing! :tu: Great. Where are those, by the way? :love:

Regarding the BCM transistors to replace the PMP:
Package type is same.
Pin 1 is moved to 2.
2 is moved to 5.
5 is moved to 1.

Made a chart tonight. Same for both of those:
Image

Annoyingly big hassle to adapt the board to those, although those seem more commonly available. Been trying tonight, but there were errors on those brd and sch files. (Basically the x0xheart brd and sch on the OML site seem to be "out of synch")

There are A BUNCH of ERC errors on the brd and sch files because of that seemingly.

Is there an updated version of those that are proper and don't have any errors when switching from brd to sch in Eagle?

Thanks in advance!

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Post by gurovnpo » Thu Dec 19, 2019 2:05 pm

guest wrote:how are you testing it? it needs a CV and a gate to make sound.

debug:

1. check powersupplies. J4 pin1 = 5.3V, pin3 = 12V
2. check VCO - apply a CV and check for square wave at J6 pin3
3. check VCF - check for signal at VCF OUT.

if the VCO doesnt work, apply an external signal to VCF IN, and check if the VCF OUT has signal.
sorry for super noobish questions, but how i will power it up? by J1 eurorack header? pin 4 GND and pin 11 5vDC. When iam wiring up from this pins, nothing happen. I want to tune TM1 for 5.3v, but when i monitoring J4 pin 1 nothing here 0v

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Post by guest » Thu Dec 19, 2019 2:53 pm

what stage is your build? is it just the x0x-heart, or is there also a pacemaker (board with all the pots and jacks and such)? if there is a pacemaker board, which one is it (SMT or Through hole)? are all the jumpers wired in place between the two boards?
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gurovnpo
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Post by gurovnpo » Thu Dec 19, 2019 4:32 pm

guest wrote:what stage is your build? is it just the x0x-heart, or is there also a pacemaker (board with all the pots and jacks and such)? if there is a pacemaker board, which one is it (SMT or Through hole)? are all the jumpers wired in place between the two boards?
x0x heart smt + pacemaker smt, wired up together as in manual, please tell me how i need power up module?

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Post by guest » Thu Dec 19, 2019 5:03 pm

ok, so that gets powered via J0 on the pacemaker board. pins1,2 are -12V, pins9,10 are +12V, and pins3-8 are ground. you dont need to connect up all the pins if thats easier, they are all shorted together on the pcb.
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gurovnpo
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Post by gurovnpo » Fri Dec 20, 2019 4:46 am

guest wrote:ok, so that gets powered via J0 on the pacemaker board. pins1,2 are -12V, pins9,10 are +12V, and pins3-8 are ground. you dont need to connect up all the pins if thats easier, they are all shorted together on the pcb.
okey thank you, but how much voltage i need to provide on J0 ?
+12/-12v from psu bus? 12v? in manual i see 5vdc max.

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Post by guest » Fri Dec 20, 2019 1:43 pm

the manual is for the x0xheart by itself, not with the pacemaker. the pacemaker board creates the 5V and sends it to the x0xheart board. J0 is a standard eurorack header, and needs +/-12V.
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gurovnpo
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Re:

Post by gurovnpo » Mon Jan 13, 2020 10:18 am

guest wrote:
Fri Dec 20, 2019 1:43 pm
the manual is for the x0xheart by itself, not with the pacemaker. the pacemaker board creates the 5V and sends it to the x0xheart board. J0 is a standard eurorack header, and needs +/-12V.
after checking power supplies. J4 i see this kind values
pin1 = 2.673V, pin3 = 5.92V

tm1 doesn't working

what i does wrong? on x0x board i measure wiring to U2, before (left side) of R6 is 14.7v right side of R6 is 2.675v
why voltage is down?

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Re: New mini xoxbox in development

Post by guest » Mon Jan 13, 2020 2:21 pm

what are the voltages on all pins of U2?
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midirobot
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Re: New mini xoxbox in development

Post by midirobot » Mon Mar 23, 2020 7:39 am

Hello : )

just finished a peacemaker board + xox heart (bought at synthcube,so plugged it everything looks like working but not the vca out ..

and to test it i unplugged it many times and last plug it backward : ( heard a little pop and realise my mistake .. now not working anymore

what should look first ? does the pacemaker provide reverse power protection ? should i replace some ic ?

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Re: New mini xoxbox in development

Post by midirobot » Mon Mar 23, 2020 8:11 am

ok got the vcf output works again after replacing tl 72 but don't get vca out working right with an env in the gate in ok
but a trigger will make just a click..is it normal ?

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Re: New mini xoxbox in development

Post by guest » Mon Mar 23, 2020 8:58 am

the pacemaker does not have reverse power protetction. there wasnt enough room on the board. it might be good to add some. the easiest way is to put some high current shottkey diodes between the +/-12V rails and ground (reverse biased). the x0xheart usually doesnt get damaged as the 7805 protects it.

look for signal in J7 pin1 on the pacemaker, and on the volume pot wiper. this will help narrow down if its a pacemaker or x0xheart issue.
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midirobot
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Re: New mini xoxbox in development

Post by midirobot » Mon Mar 23, 2020 9:37 am

wow that's fast reply : ) thx

had a look with dmm at j7 pin 1 and got 0 volts also to volume pot wiper,or i must look with an oscilloscope ?

does it can be related to calibration ?

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Re: New mini xoxbox in development

Post by guest » Mon Mar 23, 2020 9:45 am

no, it shouldnt be a calibration thing. are you measuring AC with your DMM? do you have a scope? if you dont have a scope, set your DMM to AC, and first check the VCF out jack with it, to see what sort of signal it reads. then check the other points, but be sure to have a repeating gate signal, as there is a fixed decay time, and it only make sound for a short bit after the gate is recieved.
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Re: New mini xoxbox in development

Post by midirobot » Mon Mar 23, 2020 10:15 am

ok sorry my ignorance..

so i put a gate signal from mutable grids to gate in,got a short audible waveform at vca out
but decay change nothing on the vca but work on filter.
volume knob work as expected.

took measure at the point you gave vcf out got some signal and j7 pin too volume pot also.

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Re: New mini xoxbox in development

Post by guest » Mon Mar 23, 2020 10:45 am

decay only works on the filter, its a fixed decay time on the VCA. hold the gate and give it a listen. it should have a max 6s decay time.
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midirobot
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Re: New mini xoxbox in development

Post by midirobot » Mon Mar 23, 2020 11:30 am

shame,so everything works fine next step would be calibration ! would come back if any question

thanks for your disponibility and all the work you put in this : )

take care keep safe

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