
Trill hub
BelaPlatform/Trill
Trill sensors are designed to bring beautiful touch interaction to digital projects. Trill sensors are available now on the Bela Shop and via Mouser Electronics.

Trill sensors are designed to bring beautiful touch interaction to digital projects. Trill sensors are available now on the Bela Shop and via Mouser Electronics.
Trill ring is an open-source printed circuit board by BelaPlatform, from the BelaPlatform/Trill repository on GitHub. It is a 4-layer board with 14 parts on 48 nets, routed with 469 tracks and 43 vias.
It is built around the CY8C20666A-24LQXI. Its parts include 4 resistors, 2 capacitors, 2 connectors and 1 IC.
Trill sensors are designed to bring beautiful touch interaction to digital projects. Trill sensors are available now on the Bela Shop and via Mouser Electronics.
The Bela IDE comes pre-loaded with the Trill library and Trill examples.
For other platforms:
Trill-Linux contains the Trill library and examples for Linux systems, such as Raspberry Pi
Trill-Arduino contains the Trill library and examples for Arduino, as well as Arduino-compatible systems such as Teensy. These also include examples of how to connect your Trill sensor to Processing to generate visuals.
This repo contains the editable PCB designs and manufacturing files for Trill sensors. You can download these schematic source and PCB design files and edit them yourself using KiCad.
Trill hardware designs and this datasheet are available under a Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) License, meaning they can be freely reused and remixed with attribution, provided modifications remain open source. Trill firmware is licensed under GNU General Public License 3, meaning that you can freely use, remix, change and extend the code, but you are obligated to make the modified source code available alongside any binaries (flashed, or as files) that you release.
It's possible to use Trill design files and firmware for a commercial projects free of charge under CC-BY-SA (hardware) and GPL (firmware). Both licenses allow you to use these assets yourself under the license requirements, which include publicly releasing any changes you make to the designs under the same license.
If you want to use Trill design files but not provide attribution and/or not release your source code – for example, because you want to create something to sell using these files but don't want to make your source files public – this is still possible, but requires a commercial license. Augmented Instruments Ltd. can provide you with a commercial license that fits your project and its scope. Get in touch at info@bela.io to discuss your product and the license that's right for you. More information may be found at https://learn.bela.io/products/products-overview/open-source-licenses/#using-trill-in-commercial-products
Please note: The above commercial licensing applies only to modifications to our provided firmware code and PCB designs. You can buy Trill sensors and use them in any commercial or personal project without any additional licensing costs.
Trill and Bela names and logos are copyright Augmented Instruments Ltd. Any designs that you release or produce should not use the Trill name or logo and/or the Bela name and logo, whether modified or exact copies.
This repo contains the Trill datasheet. There is one datasheet for all Trill sensors that includes technical diagrams and usage information.
Fritzing parts are available for all Trill sensors, in the Bela Fritzing repo.
The Bela Knowledge Base contains great documentation on using Trill! Visit learn.bela.io/trill for more information, as well as our Get Started Guide.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100 | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | 47k | Resistor_SMD:R_0402_1005Metric | R3, R4 |
| 1 | 0.1u | Capacitor_SMD:C_0402_1005Metric | C1 |
| 1 | 2.2n | Capacitor_SMD:C_0402_1005Metric | C2 |
| 1 | Button A | TestPoint:TestPoint_Pad_D2.0mm | TP2 |
| 1 | Button B | TestPoint:TestPoint_Pad_D2.0mm | TP1 |
| 1 | CY8C20666A-24LQXI | TRILL:QFN-48-1EP_6x6mm_P0.4mm_EP4.6x4.6mm | U1 |
| 1 | Conn_01x04_MountingPin | TRILL:qwiic_horizontal_SMD | J1 |
| 1 | Conn_01x06_Female | TRILL:I2C+EVT_RST_Wire_connector_SMD | J2 |
| 1 | Jumper_2x3_Open | TRILL:SolderJumper-2x3_P1.3mm_Open_Pad1.0x1.5mm | JP1 |
| 1 | OpenSourceHardware_Logo | TRILL:OpenSourceHardware_Logo | G5 |
| 1 | TRILL_RING-28_CapSense | TRILL:TRILL_RING_CapSense | CS1 |
14 parts, built around the CY8C20666A-24LQXI. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the BelaPlatform/Trill repository on GitHub, at the commit this page was made from: the board is hardware/ring/REV_C3/trill-ring.kicad_pcb and its schematic hardware/bar/REV_C3/trill-bar.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask BelaPlatform before reusing the design.

BelaPlatform/Trill
Trill sensors are designed to bring beautiful touch interaction to digital projects. Trill sensors are available now on the Bela Shop and via Mouser Electronics.

BelaPlatform/Trill
Trill sensors are designed to bring beautiful touch interaction to digital projects. Trill sensors are available now on the Bela Shop and via Mouser Electronics.

BelaPlatform/Trill
Trill sensors are designed to bring beautiful touch interaction to digital projects. Trill sensors are available now on the Bela Shop and via Mouser Electronics.

BelaPlatform/Trill
Trill sensors are designed to bring beautiful touch interaction to digital projects. Trill sensors are available now on the Bela Shop and via Mouser Electronics.

BelaPlatform/Trill
Trill sensors are designed to bring beautiful touch interaction to digital projects. Trill sensors are available now on the Bela Shop and via Mouser Electronics.

BelaPlatform/Trill
Trill sensors are designed to bring beautiful touch interaction to digital projects. Trill sensors are available now on the Bela Shop and via Mouser Electronics.

BelaPlatform/Trill
Trill sensors are designed to bring beautiful touch interaction to digital projects. Trill sensors are available now on the Bela Shop and via Mouser Electronics.

BelaPlatform/Trill
Trill sensors are designed to bring beautiful touch interaction to digital projects. Trill sensors are available now on the Bela Shop and via Mouser Electronics.

BelaPlatform/Trill
Trill sensors are designed to bring beautiful touch interaction to digital projects. Trill sensors are available now on the Bela Shop and via Mouser Electronics.

StuckAtPrototype/Racer
These are structured into their own files. I could have used submodules, but decided against it.

hackclub/OnBoard
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MicroCoreLabs/Projects
Ted Fried's MicroCore Labs Projects - FPGA CPU cores and emulators for the 8088, 8086, 8051, 6502, 68000, Z80, Risc-V, and also Typewriter and EPROM Emulator projects.


nanographs/Open-Beam-Interface
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CRImier/MyKiCad
My KiCad boards. Can't be bothered uploading individually anymore, so here you go.

