Hi,

I'm investigating capacitive touch sensing as the user interface on a light switch project I am working on. I would like the interface to have a single button for ON/OFF control and a separate slider for dimming control.

I have read the series of tutorials within the AAC's reference library, particularly the project by Robert Klein (https://www.allaboutcircuits.com/projects/circular-touch-sensing-with-an-efm8-microcontroller/).

Before I start down the route of the SiLabs EFM8 I wondered if anyone knew of a reference design which I could use to incorporate within my overall design? Or perhaps if someone has done what I plan to do and would be happy to share their experiences?

Thanks,

Neil

 

You can do touch sensing without a microcontroller, but if you insist, you might be better off posting in, "Embedded Systems and Microcontrollers. If you wish to move your request, click on the "report" button and ask a Moderator to assist you.

 

The below was just used two ICs to do the control with finger, you can refer to the circuit and talk some more about what you want.
A single touch pad ON/OFF toggle switch.