What is the EuroPi? (+ Assembling the DIY kit)
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- Опубліковано 25 лют 2021
- This video goes over the assembly of the EuroPi as a DIY kit using the custom PCB, while I talk through the concept for the project and my thought processes while designing it.
Please feel free to comment below or contact me on any of my social media if you've got any questions about this project, or any suggestions for features you think it should have.
More photos of the project can be found on my design Insta:
/ roryallendesign
An entire project log can be found on my portfolio site at
www.behance.net/roryjamesallen - Розваги
![[SunVox/MODEP/Patchbox OS] Raspberry Pi 4 Music Cyberdeck](/img/n.gif)
yes, please put these into production. My exact dream come true to be able to have this small clean platform to code on. I struggle more with the hardware...or when I do do hardware its protoboard and huge modules and messy. A neat PCB solution is really needed. Will follow and put a few orders in if it does go into production - fingers crossed
This is exactly what I was thinking when I first saw the pico pi. I'll be following your work.
Thanks! I've always wanted to make some kind of digital module but the Pi seems like just the thing to make it accessible, with it being almost a house name now for anyone who does programming
The holly grail. I hope the project is still on track
It's still going strong; the newest version is currently at the final stages of prototyping, now with 6 CV outputs (0-10V), one analogue input, one digital input, and an OLED display!
I love this so much! Can’t wait to see this as a kit...
I love this project and will be following along for updates. Really cool work!
I absolutely LOVE this project. I know very little about these sorts of things, but recently have been looking into using Arduino's or similar devices for synthesizers, and over the past few months have really dug into the Eurorack, modular synth, etc. Idea.
First, I found the Pi based Zynthian, something I still hope to build over the next while, but was a bit out of my immediate budget.
Then, I found the Teensy boards, with the DAC in the LC and 3.x variants, but almost right after, the Pi Pico was announced, which, while it doesn't have a DAC, has a cost that blows almost anything else out of the water, and with your EuroPi build, it has a huge potential, and seems like a great project for someone like myself who is just getting started, knows functionally nothing but wants it to be able to expand.
With that in mind I know very little about these things in practice. If/when you get this on kickstarter, I will GLADLY buy it. In the meantime, I cannot seem to find a list of parts, schematics, etc, (or maybe some advice on where to get one of the PCB's, etc.) and would like to know, what is the quickest way someone like myself could dive in and build one of these beauties?
Hello, I'm really glad you like the project! At the moment the only PCBs I have is a small batch of 10 that I had make to test myself, so there aren't any commercially available until I get the newest version made with all the improvements that you guys have suggested. My Instagram is where I'll be posting updates though, so as soon as anything is available you'll know through there!
a taller panel with a large buchla/verbos style knob, a light next to every jack, and 1 or 2 buttons.
this opens up possibilities like a jack selector with the light and button.
Almost all of those suggestions have been fulfilled in the newest version of the module! Some more details about the newest hardware are in the most recent video!
a spot on the pcb for i2c header. a lot of modular stuff is including functionality for this. especially monome stuff. I feel like you could really do all kinds of stuff with a digitally programmed module interacting with other modules through i2c.
Headers for expansion boards are on the newest PCB design! I'm looking forward to seeing what boards people can design to compliment the EuroPi
Bruh!! Do it! Would defs buy this.
thank *YOU*
hello @Allen, wouldn't it be better to have an assignable switch button in order to make the 2 potentiometer more useful?
It's been a while, but the current version (which will soon be dropping on the shop www.allensynthesis.co.uk/shop.html ) has 2 assignable push buttons for any function, including changing the function of either of the potentiometers, or their sensitivity for example!
Great project, would you consider modifying it to use endless encoders(something like ky-40) instead of pots, this would up the cost a bit but open up heaps of possibilities
Definitely! I've had this suggested and I'm strongly considering changing the pots to encoders. It would also open the ADC pins of the Pico up for analogue jack inputs which would be really nice
Hi! I love this idea. I'm planning to build something similar with 8 CV gates for drums, using a Raspi 4. Do you think the resistor/capacitor combination you have used would be suitable to do this accurately? I don't think my electronics chops are good enough to work out a good combo by experimentation.
Thanks! This combination works well for this project, and as long as your RPi 4 can get the same PWM frequency (100MHz) then there's no reason it wouldn't work just as well. If you can only get a lower PWN frequency then just use a larger capacitor to increase the cutoff frequency. This will make the slew higher but will mean you don't hear the buzz from the carrier wave even at lower frequencies
@@AllenSynthesis Thanks very much for the advice. Much appreciated. I'll definitely keep my eye on your modules. They look great!
Does this feature any kind of IO protection and/or buffering?
Hello! The version in this video does not, however the version I'm currently working on (EuroPi V2) has 6 outputs, all can be either analogue or digital, and all are completely protected from inputs and can output 0-10V. It also has one analogue and one digital input, also protected and can accept the full 10V Eurorack range
Hi, I don't see a power circuit anywhere.. am i safe to assume this is just the faceboard without the rest of the circuitry?
cheers
Sorry for the late response! Yup, this one is just the prototype version so has no protection circuitry, but the currently on sale version is much improved and is fully protected for Eurorack voltages!
For more information about this project, a mailing list sign up, and related merch, check out the site! www.allensynthesis.co.uk
Hey Allan, this looks great!
I'm currently also stepping into the microcontroller to build hardware world, I'll definitely back this when you get it on kickstarter.
Do you have a mailing list or something so I don't miss its launch?
(note: the Instagram link you posted is incomplete)
Hi! Thanks so much, I've fixed the Instagram link now, to be honest that is the best place to get updates. I'll definitely think about putting a mailing list together though, to be honest I'm flattered by how much more interest there has been than I expected!
@@AllenSynthesis Will the mailing list be managed via Instagram?
If people would prefer I can put together an email mailing list, but until I get around to it my Instagram is where I'll post new info on the project!
@@AllenSynthesis That would be great for non-IG people (myself included). For now I'm following on here, so hopefully I'll see updates as you post them here.
Hello! No emailing list yet but hopefully this is more useful, the project know has a subreddit where all the info is linked, and anyone can post or comment questions or suggestions! www.reddit.com/r/EuroPi?
Any updates on this project or additional modules? I'm very curious about this.
It is now available as a Panel+PCB kit, and hopefully soon will be available as a full DIY kit and fully assembled through distributors! www.allensynthesis.co.uk/index.html
@@AllenSynthesis Looks like everything is sold out, any idea when a restock is coming? Thanks! Super excited about this project.
@@benmijts1821 Re-stock coming soon! I am working with other companies to hopefully bring the module out in full DIY kit form, and potentially fully assembled, but there should be a re-stock of panel+PCB kits next week!
@@AllenSynthesis You should put this link in the video description :)
Is there a schematic of the EuroPi so I can see how it works?
Sure! If you go to the EuroPi subreddit, there's a link to the GitHub where I've got the PCB files and code for it all publicly available
I love the idea, but eurorack uses high voltages (+-12v) compared to the pico pi (+3.3V or max +5.5v ). I see no power section, input protection, or output amplification at all.. I know it takes a lot more space to include all that, but I don't see how it is going to be part of a modular synth this way. It doesn't look like I can plug any bipolar cv in this without breaking something or get proper cv levels out. Can this really be considered eurorack this way?
Completely agree, thats the main thing I'm working on at the moment. I'm currently planning to op-amp buffer every output and input to bring the levels up to EuroRack standard
@@AllenSynthesis How is this coming along? I believe it will be a deal breaker for many.....
@@sirtexy4554 I'm currently designing a third optional PCB which will sit between the current two, and which will convert and buffer the 3.3V outputs to Eurorack 10V. Quite a few users have built these now and I haven't had any complaints about the available voltage range or any reports of damaged Picos, so I'm still considering it non-essential but very nice to have
Decent prototype, needs to be actually compatible with eurorack.
Almost all commercial modules will work perfectly with the EuroPi as they don't need a high input voltage to act as a gate or trigger, and 3 octaves is very usable for most people (and at the price). For people who desperately need a higher voltage range it will cost more due to the hardware required, but I'm working on expansion boards that allow it!
Micropython? Any code or github?
I've been programming in MicroPython only since I bought the Pico around a month ago, and so far I haven't found a single bit of Syntax that's different from regular Python. I'll be uploading all programs that I write for the EuroPi to GitHub eventually, but I want to make sure they're foolproof first!
Cool! My dream? Programming an eurorack module with Csound or SuperCollider language
@@AllenSynthesis numpy and matplotlib would be missing for me I have to say. Good Luck however - you will for sure have loads of fun with that project.
@@adelaidewilliams7592 try Faust maybe from Grame
It is a drawback that it's got some libraries missing but people are writing them for MicroPython every day. If I recall they've already made a version of Numpy for Micro, and MatPlot probably wouldn't be too much use without a display (Assuming it's just for plotting and manipulating data)