SX8634 Touch Sensor Breakout

The SX8634 is an i2c capacitive touch sensor with slider support, flexible GPIO pins, and non-volatile configuration storage.

As with most such sensors, circuit board layout is a special consideration. So I wanted to do it once, do it well, and be done with it for many hand-held projects to come.

This board was designed to use the default configuration of the SX8634, but there is a demo program in the repo for writing the NVM.

Components

1 × SX8634 Semiconductors and Integrated Circuits / Misc. Semiconductors and Integrated Circuits

Project Logs

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2020.02.09: Video of board in action
J. Ian Lindsay • 02/10/2020 at 04:51 • 0 comments

I finally got around to shooting some video of a project using this board.
2019.09.29: Arduino driver is working
J. Ian Lindsay • 09/29/2019 at 08:27 • 0 comments

The synchronous conversion is complete. The only thing untested is the NVM burn feature.
2019.09.12: Finished units are now available on Tindie
J. Ian Lindsay • 09/12/2019 at 16:37 • 0 comments

Post title says it all. :-)

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Discussions

arthurb wrote 08/04/2019 at 11:42

Cool!

What about gerbers?)

Are you sure? yes | no

J. Ian Lindsay wrote 08/10/2019 at 00:09

Published kicad src last night. Gerber generation is easy from there.

https://github.com/jspark311/SX8634-Breakout

Are you sure? yes | no

J. Ian Lindsay wrote 08/10/2019 at 00:46

If you want to buy one, I was thinking of making this my inaugural offering on Tindie. But it would likely be faster to order it off Osh and hotplate it yourself.
The SX8634 is a bit pricey for what it does, relative to other similar parts from other vendors. But I have zero complaints with this part so far.
I've found no mistakes in the datasheet (which is clear and complete), and the board performs beautifully.

The only driver I have written for it is for ManuvrOS. But an Arduino port wouldn't be difficult.

Are you sure? yes | no

arthurb wrote 08/16/2019 at 21:50

thx a lot!

Are you sure? yes | no

J. Ian Lindsay wrote 08/17/2019 at 03:27

You bet. :-)

Here is my fully-functional driver for the part. As I said, it isn't as easy as Arduino, and a port is probably forth-coming. But it should help you see what the thing can do.

https://github.com/Manuvr/ManuvrOS/tree/master/ManuvrOS/Drivers/SX8634

Are you sure? yes | no

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SX8634 Touch Sensor Breakout

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Project Logs Collapse logs

2020.02.09: Video of board in action

2019.09.29: Arduino driver is working

2019.09.12: Finished units are now available on Tindie

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