1 Reply Latest reply on Feb 1, 2020 2:23 AM by GaneshD_41

    capacitive touch not working in class

    RARA_2227736

      Hi I am using CY8C4014SXI-421,  CY8C4024AZI-S413 controller for capacitive touch application. i am using 4 to 7 mm Class overlay. in this 4 mm is class and 3 mm is light guide for LED.   in the transparent class its working as per the expectation. actually this has to go for mirror. in the  mirror coated area its not working. the coating may less than 0.2mm. actual app its engraved  in the mirror in the capacities touch switch area. could you please help on this.

        • 1. Re: capacitive touch not working in class
          GaneshD_41

          Hi,

           

          Please note that the mirror coating should be non-conductive. if it is non-conductive, we think 7mm thickness is high for the sensor area that you have. Please attach some images of your board as well as sensors to understand the real situation.

           

          What is the value of SNR you are getting for your sensors? If it is less than 5, you have to manually tune your sensors following the procedure mentioned in section 5.3 of the PSoC 4 and 6 CapSense Design guide.

           

          https://www.cypress.com/file/46081/download

           

          You can use CapSense Tuner to measure the SNR and to tune the sensors. Please refer CapSense component datasheet to see the steps required for Tuning.

           

          Please update the thread if you have any queries.

          Thanks

          Ganesh