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4 layersTrill ring, the printed circuit board in 3D

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.

Copper layers
4
Thickness
0.8 mm
Parts
14
Nets
48
Pads
118
Tracks, vias
469, 43
Pours
29
Routed
Yes
KiCad
KiCad 7 (file 20221018)
Created
23 Jun 2020
Updated
3 Feb 2025

Overview

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.

Main components

1

README

README.md

Trill: Touch Sensing for Makers

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 libraries and examples

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.

Trill hardware designs

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.

Source Files and Licenses

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.

Commercial Licensing

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 name and logo

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.

Datasheet

This repo contains the Trill datasheet. There is one datasheet for all Trill sensors that includes technical diagrams and usage information.

Fritzing files

Fritzing parts are available for all Trill sensors, in the Bela Fritzing repo.

Learn more

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.

Parts

14
QtyValueFootprintReferences
2100Resistor_SMD:R_0402_1005MetricR1, R2
247kResistor_SMD:R_0402_1005MetricR3, R4
10.1uCapacitor_SMD:C_0402_1005MetricC1
12.2nCapacitor_SMD:C_0402_1005MetricC2
1Button ATestPoint:TestPoint_Pad_D2.0mmTP2
1Button BTestPoint:TestPoint_Pad_D2.0mmTP1
1CY8C20666A-24LQXITRILL:QFN-48-1EP_6x6mm_P0.4mm_EP4.6x4.6mmU1
1Conn_01x04_MountingPinTRILL:qwiic_horizontal_SMDJ1
1Conn_01x06_FemaleTRILL:I2C+EVT_RST_Wire_connector_SMDJ2
1Jumper_2x3_OpenTRILL:SolderJumper-2x3_P1.3mm_Open_Pad1.0x1.5mmJP1
1OpenSourceHardware_LogoTRILL:OpenSourceHardware_LogoG5
1TRILL_RING-28_CapSenseTRILL:TRILL_RING_CapSenseCS1

Questions

What parts does the Trill ring use?

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.

Where can I download the Trill ring KiCad files?

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.

Can I use the Trill ring design in my own project?

Its repository states no licence, so its author keeps all rights: ask BelaPlatform before reusing the design.

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