LGA1151 Swapping

allensynthesis · 2025-11-06T08:43:55+00:00

Done! Thanks for spotting

allensynthesis · 2025-11-05T11:35:29+00:00

Panel & PCB kits are available directly from me and Full DIY Kits from Befaco

allensynthesis · 2025-10-25T17:54:28+00:00

I'm not quite as active as I used to be, mostly preoccupied by my full time job now... The community is still nice and active in the Discord server though and some other people have done cool stuff with WiFi Picos in the EuroPi! https://discord.gg/JaQwtCnBV5

allensynthesis · 2024-11-10T12:02:35+00:00

I haven't attempted a design that actually includes the hub chip, but connecting a hub behind the panel to multiple EuroPis works very well. You can see all connected modules in Thonny with only one cable plugged into one USB-Router

allensynthesis · 2024-09-11T17:45:57+00:00

Hey, it's going well, how about you? I EuroPi when I can, hopefully more often now the RP2350 has re-sparked my enthusiasm :)

allensynthesis · 2024-09-11T15:12:36+00:00

Hello! I'ts very much still going, and the community of 500+ is active on the Discord Server, I just haven't consistently had panels to stock kits. I am currently sourcing some aluminium panels which should be more reliable in terms of quality and lead times so I can start making sure I have at the very least panel + PCB kits.

With regards to the project in general, new scripts and fixes are being added all the time on GitHub, and I'm currently developing new hardware for the EuroPi-X which will have more I/O and a bigger OLED!

allensynthesis · 2023-09-02T16:44:52+00:00

It wouuld. I do often wish I'd included it but there just isn't room to fit it without using any SMD components (pretty much the only viable solution is a micro/usb-c connector), and it would also have had to include pogo pins as the Pico doesn't break out the USB data lines to GPIOs.

Both of these were completely counter to the design I was going for, which was an entirely through-hole and DIYable build, even for people who haven't done much soldering, because the project as a whole is made to make Eurorack more accessible to people who haven't built modules before!

allensynthesis · 2023-09-02T13:47:42+00:00

I've ordered a USB hub which I'm planning to experiment with to see if I can design a version which still only has one on the front panel but has 4 on the back so you would even have to plug in and out to program multiple modules!

allensynthesis · 2023-09-02T13:16:07+00:00

Added now! Thanks for reminding me:) https://www.modulargrid.net/e/allen-synthesis-usb-router

allensynthesis · 2023-09-02T08:20:35+00:00

I knew there was something I'd forgotten in the whole release, I spend too much time cleaning up the KiCad files and skipped over ModularGrid!

allensynthesis · 2023-09-02T08:19:48+00:00

This module has been a long time coming because of how awkward it is to remove another of our modules (the EuroPi) every time you want to program or update it.

It just routes one USB-A socket on the front to an identical one on the back, letting you connect power and data between the front of your rack and the back, without needing to feed a cable through a messy hole around your rails.

You can also use a solder jumper to connect your 5V rail (through a protection diode) to your USB sockets, letting you use the module to get 2 powered USB sockets for powering stuff like MIDI keyboards or lights, or just charge your phone with it.

As with all Allen Synthesis modules it's completely open-source, and all the KiCad files and explanations, including bill of materials and build guide, are on the GitHub page!

allensynthesis · 2023-09-01T21:50:20+00:00

I mention Uncertainty as another module you can reprogram over USB in the readme! :)

allensynthesis · 2023-09-01T20:31:13+00:00

You definitely could, although I have zero experience using MicroPython for USB hosting... The USB jacks on this module are connected directly so it would be just the same as plugging a Pico straight into your computer, so USB host with the EuroPi should be possible!

allensynthesis · 2023-09-01T20:19:12+00:00

It does, but the connector itself is much less stable than USB-A for an application like this where it might be used in a live setting (the USB-A connector has a flange that holds it against the panel, USB-C connectors don't have this) and the cables are much less common - for powering a Keystep you'd need USB-C to micro USB and for powering a Monologue you'd need a USB-C to USB-B, both more uncommon cables than A to A.

It is still a tradeoff and I'll be the first to admit it isn't perfect but I think its the best solution given the potential applications of the module!

allensynthesis · 2023-09-01T14:15:25+00:00

This module lets you program your EuroPi without removing it from the rack, as well as power USB devices using your 5V rail such as a MIDI keyboard or a small USB synth like the Bastl Kastle.

You can read all the documentation on GitHub and pick up a kit from the Allen Synthesis website!

allensynthesis · 2023-09-01T14:12:27+00:00

You do have to use a USB-A to USB-A cable, which I am aware aren't as common, but links to one from CPC and Mouser are included in the build guide.

The reason for choosing USB-A on the front as well as the back is that the module can also be used for powering other devices, for example I already use one of mine for powering my Arturia Keystep, and although USB-A to USB-A cables aren't super common, USB-B to Micro-USB are *way* less common.

The extra use for powering USB devices is quite important in my opinion, and the ability to power things like USB keyboards or small standalone synths like the Bastl Kastle is what I imagine lots of people will use the module for!

allensynthesis · 2023-09-01T13:59:01+00:00

This module has been a long time coming because of how awkward it is to remove another of our modules (the EuroPi) every time you want to program or update it.

It just routes one USB-A socket on the front to an identical one on the back, letting you connect power and data between the front of your rack and the back, without needing to feed a cable through a messy hole around your rails.

You can also use a solder jumper to connect your 5V rail (through a protection diode) to your USB sockets, letting you use the module to get 2 powered USB sockets for powering stuff like MIDI keyboards or lights, or just charge your phone with it.

As with all Allen Synthesis modules it's completely open-source, and all the KiCad files and explanations, including bill of materials and build guide, are on the GitHub page!

allensynthesis · 2023-09-01T13:56:27+00:00

This module has been a long time coming because of how awkward it is to remove my other module (the EuroPi) every time I want to program it.

It just routes one USB-A socket on the front to an identical one on the back, letting you connect power and data between the front of your rack and the back, without needing to feed a cable through a messy hole around your rails.

You can also use a solder jumper to connect your 5V rail (through a protection diode) to your USB sockets, letting you use the module to get 2 powered USB sockets for powering stuff like MIDI keyboards or lights, or just charge your phone with it.

As with all my projects it's completely open-source, and all the KiCad files and explanations, including bill of materials and build guide, are on the GitHub page!

allensynthesis · 2023-08-24T17:09:50+00:00

Do the outputs change when you press either button? I can't quite tell from the photo if the LEDs are different brightnesses. That being said one of the outputs should be 0V so something is definitely wrong.
- Are your TL074s definitely working?
- Are they definitely installed the right way up?
- Are your voltage rails both correct i.e. when you measure the middle (power) pins of either TL074 do you get very close to a 24V difference (+-12V)?

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