OPERA ROTAS, a DIY mutant drum machine BUILD THREAD

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Bodo1967
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Re: OPERA ROTAS, a DIY mutant drum machine

Post by Bodo1967 » Wed Jul 22, 2020 3:13 am

SphericalSound wrote:
Tue Jul 14, 2020 4:01 am
There will arrive 3-4 new units hopefully during this week and plenty more in 3 weeks approx.
Just joined the waitlist, hope there'll be one left for me :nana: !
... why buy it for $100 when you can build it yourself for $150?

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by Bodo1967 » Thu Jul 23, 2020 2:01 am

Bodo1967 wrote:
Wed Jul 22, 2020 3:13 am
Just joined the waitlist, hope there'll be one left for me :nana: !
Received an "it's available" e-mail yesterday evening, but when I clicked the link there already weren't any left.

I hope that was referring to the 3 - 4 units you mentioned last week, and I can get one when the announced bigger batch becomes available ;) .
... why buy it for $100 when you can build it yourself for $150?

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by SphericalSound » Sat Jul 25, 2020 3:52 am

Im selling the prototype unit here in case anyone is interested. Needs a bit of hacking, 75€ discount:

https://www.ebay.es/itm/203057931042
Last edited by SphericalSound on Sat Jul 25, 2020 3:56 am, edited 1 time in total.

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by SphericalSound » Sat Jul 25, 2020 3:55 am

Bodo1967 wrote:
Thu Jul 23, 2020 2:01 am
Bodo1967 wrote:
Wed Jul 22, 2020 3:13 am
Just joined the waitlist, hope there'll be one left for me :nana: !
Received an "it's available" e-mail yesterday evening, but when I clicked the link there already weren't any left.

I hope that was referring to the 3 - 4 units you mentioned last week, and I can get one when the announced bigger batch becomes available ;) .
The bigger batch is coming. There´s some waiting list and coronadelays but Im positive during august and september there will be a nice stock

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by rosch » Sat Jul 25, 2020 4:55 am

Awesome, just joined the waiting list too. It's something you just can't ignore :D

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by Bodo1967 » Tue Jul 28, 2020 1:45 am

SphericalSound wrote:
Sat Jul 25, 2020 3:55 am
The bigger batch is coming. There´s some waiting list and coronadelays but Im positive during august and september there will be a nice stock
Wow. When I ordered mine yesterday, there were only 2 left :-O . Just in time :party: .
... why buy it for $100 when you can build it yourself for $150?

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by Sir Ruff » Sat Aug 01, 2020 12:13 pm

Paradigm X wrote:
Tue Jun 16, 2020 4:59 am
thats brilliant, thank you. id love a metal enclosure. sorry one more question does it have separate outputs for the sounds? also if youre tinkering with MIDI if it could also send MIDI notes out that would be superb.!

Very excited, will def grab one in the next run, thanks for sharing!
This sounds great! And yes, agree that any sort of case would be handy.

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by SphericalSound » Thu Aug 06, 2020 11:49 pm

An user send me this song made mostly with Opera Rotas

https://bandcamp.com/EmbeddedPlayer/v=2 ... ork=small/

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by autodafe » Fri Aug 07, 2020 2:04 am

Just received my PCB some days ago
Officially on holiday from today, I ordered some parts I wass missing and hopefully next week I'll start soldering it ;-)

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by Bodo1967 » Fri Aug 07, 2020 2:27 am

autodafe wrote:
Fri Aug 07, 2020 2:04 am
I ordered some parts I wass missing and hopefully next week I'll start soldering it ;-)
So did/am I :D. Received the pots and the whatchamacallit SMT chips that go on the back side yesterday. The only parts now still on their way are the switch buttons (should arrive today or tomorrow) and the breakout boards (hope to have them by the end of next week).

:nana:
... why buy it for $100 when you can build it yourself for $150?

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by Bodo1967 » Fri Aug 07, 2020 2:05 pm

SphericalSound wrote:
Thu Aug 06, 2020 11:49 pm
An user send me this song made mostly with Opera Rotas

https://bandcamp.com/EmbeddedPlayer/v=2 ... ork=small/
:tu: :tu: :tu:
... why buy it for $100 when you can build it yourself for $150?

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by autodafe » Sat Aug 08, 2020 2:21 pm

I started soldering it, I still need to receive some parts...
A couple of questions:

1) where is the firmware? ;-)
2) do you have a link or a a part number for the MIDI stereo Jack?

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by SphericalSound » Mon Aug 10, 2020 2:46 am

autodafe wrote:
Sat Aug 08, 2020 2:21 pm
I started soldering it, I still need to receive some parts...
A couple of questions:

1) where is the firmware? ;-)
2) do you have a link or a a part number for the MIDI stereo Jack?
1- I´ll send you to your mail. Flashing it it´s a complex process only suited for advanced users. You need to have an stlinkv2 programmer, platformio, stlink programming utility and experience with bluepills. For non experts it´s better to source one preprogrammed chipset with the PCB

2- This kind:

https://es.aliexpress.com/item/32708092297.html

Image

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by autodafe » Mon Aug 10, 2020 2:56 am

SphericalSound wrote:
Mon Aug 10, 2020 2:46 am
1- I´ll send you to your mail. Flashing it it´s a complex process only suited for advanced users. You need to have an stlinkv2 programmer, platformio, stlink programming utility and experience with bluepills. For non experts it´s better to source one preprogrammed chipset with the PCB
oh, I thought It was something doable with Arduino IDE and USB. However, I have a StlinkV2, I think I can manage that, but never used a "Blue Pill"...
Thansk for the hint about the jacks, I have plenty of them but I am afraid they are all mono...

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by bengersfood » Mon Aug 10, 2020 6:09 am

What do we do when firmware updates time comes round. Is that a simpler process?

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by Bodo1967 » Mon Aug 10, 2020 6:21 am

bengersfood wrote:
Mon Aug 10, 2020 6:09 am
What do we do when firmware updates time comes round. Is that a simpler process?
Hopefully - I'd like mine to accept a MIDI clock (or is this already implemented with the ones sent about 2 weeks ago?) so I can easily integrate it with my other setup. I use the E-RM MIDI Clock as master clock.

Oh - and I just saw it is my 4 year WiggleVersary today :mrgreen: :party: .
... why buy it for $100 when you can build it yourself for $150?

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by SphericalSound » Mon Aug 10, 2020 9:52 am

bengersfood wrote:
Mon Aug 10, 2020 6:09 am
What do we do when firmware updates time comes round. Is that a simpler process?
For updating the software you need an stlinkv2 too. It´s simpler as it has the bootloader and you dont need to compile nothing, just upload the firmware.

The stlinkv2 costs around 2-4USD depending on where you get it.

You can also update just using USB but it´s way more complex and not suitable for beginners.

There must be a way to update easily via USB but I haven´t found how to do it yet.

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by SphericalSound » Mon Aug 10, 2020 9:55 am

Bodo1967 wrote:
Mon Aug 10, 2020 6:21 am
bengersfood wrote:
Mon Aug 10, 2020 6:09 am
What do we do when firmware updates time comes round. Is that a simpler process?
Hopefully - I'd like mine to accept a MIDI clock (or is this already implemented with the ones sent about 2 weeks ago?) so I can easily integrate it with my other setup. I use the E-RM MIDI Clock as master clock.

Oh - and I just saw it is my 4 year WiggleVersary today :mrgreen: :party: .
The actual one emits clock pulses but not accepts midi nor clocks yet. It should be implemented, hopefully, in a few months. The guy that is helping me with midi is quite busy.

If there are coders interested in collabs with Spherical Sound Society, please PM :tu:

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by autodafe » Mon Aug 10, 2020 10:11 am

yes, please add clock in :-) This would be a killer integrated into a Modular setup...

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by NS4W » Tue Aug 11, 2020 1:45 am

SphericalSound wrote:
Mon Aug 10, 2020 9:52 am
The stlinkv2 costs around 2-4USD depending on where you get it.
Something like this? : https://www.ebay.com/itm/Quality-ST-LIN ... 0005.m1851

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by rosch » Tue Aug 11, 2020 8:24 am

Is a FW only option possible in the future? I'd probably make a panel with bigger buttons. I guess i'd need just some perfboard that connects a generic MCU daughterboard and display etc and holds some connectors for the wiring. If not, a pcb + chip solution would be cool too, probably more easymode

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by SphericalSound » Tue Aug 11, 2020 10:18 am

NS4W wrote:
Tue Aug 11, 2020 1:45 am
SphericalSound wrote:
Mon Aug 10, 2020 9:52 am
The stlinkv2 costs around 2-4USD depending on where you get it.
Something like this? : https://www.ebay.com/itm/Quality-ST-LIN ... 0005.m1851
Yeah exactly. You can get it even cheaper, thought

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by SphericalSound » Tue Aug 11, 2020 10:21 am

rosch wrote:
Tue Aug 11, 2020 8:24 am
Is a FW only option possible in the future? I'd probably make a panel with bigger buttons. I guess i'd need just some perfboard that connects a generic MCU daughterboard and display etc and holds some connectors for the wiring. If not, a pcb + chip solution would be cool too, probably more easymode
What FW mean?

I would love to see your build by the way :omg:

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by Bodo1967 » Tue Aug 11, 2020 12:48 pm

SphericalSound wrote:
Tue Aug 11, 2020 10:21 am
What FW mean?
Firmware? 8-)

And I ordered one of these ST-Link V2 thingies today, it was about € 3.60 in total. I'll be ready for updates when they come.
And I hope I get the few remaining parts by the end of this week so hopefully I can finish the build soon. Most of it is done now.

The breakout boards are still missing and on their way, so is the 4N35. It only needs to be inserted into the socket when it arrives, and I need to solder the display and the otherwise finished OPL2 sub board. LEDs, pots, switch buttons and the other parts are all done now.
... why buy it for $100 when you can build it yourself for $150?

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Re: OPERA ROTAS, a DIY mutant drum machine

Post by rosch » Tue Aug 11, 2020 1:04 pm

Yes Firmware only would be cool. If I understand correctly the pcb is mostly control surface and keeps the MCU and display running. So I could probably do without it, but I would also get the pcb + chip option of course.

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