I2C Header Cable and Capelet Design Templates

insultcomicdog

I'm trying to simplify my wiring to my Bela.

I have a Bela, Trill Hub and some Trill sensors (craft, ring, bar)....

I noticed a large I2C header on the Bela. Is there a single cable that can be using this to the Trill Hub, instead of using the qwiic to dupont connectors which connect to P9.24 and P9.26? The I2C pinout orientation of this header is different from Trill Hub, so I'm guessing not. What are the specs of this header and what is it used for normally?

If I want design a basic capelet that sits on Bela would this be the best placed to start?

https://github.com/BelaPlatform/bela-hardware/tree/master/bela-kicad-library

My custom caplet would have a neopixel header, i2c header for trill craft, and a bank of vcc, grnd, analog input / output headers for easy connectivity.

I've used Eagle once before, but since it's being discontinued I need to starting learning KiCad.

giuliomoro

insultcomicdog I noticed a large I2C header on the Bela. Is there a single cable that can be using this to the Trill Hub, instead of using the qwiic to dupont connectors which connect to P9.24 and P9.26? The I2C pinout orientation of this header is different from Trill Hub, so I'm guessing not. What are the specs of this header and what is it used for normally?

It was used on the d-box and it's been kept around ever since because it may be more convenient to find the pins there rather than counting them on P9. One can connect socket-to-pin duponts to the trill hub and solder them there while putting the sockets on this header.

max

Regarding the custom capelet:
We have a capelet for the Belamini, called Belamini-Addon, that can be found in the Bela KiCad Library and comes as Symbol and Footprint.
We also made one for the Bela Gem (to be published soon, when pinout is finalized and verified)!
Unfortunately do not have it in the same convenience for your Bela System (REV C) Cape. That said, you can use the BeagleBone_Black_Header from the Bela KiCad Library to start. This will come close.
Learning KiCad is worth it! If you want a review of your design, post it here.