capsense slider using concentric circles | Cypress Semiconductor
capsense slider using concentric circles
I want to create a single capsense button which is only activated if the button is pressed in the middle.
I want to rule out a button press in case of wiping over the button (unintentional activation).
My idea is to create a slider which exists of concentric circles to detect a movement over the button using the 'centroid' value calculated by the processor (CY8C41xx series)
I have created the design below:
The circles are made of ITO on a foil. The foil ends in a 6mm wide tail with 5 contacts to use in combination with an omron PCB connector.
The blue and green circles are used as slider segments for detection. The brown circle at the outside is used as shield electrode.
The segment in the middle is 10.3mm wide (approx. the size of a fingertip). The distance between the segments is 0.5mm. The total foil is 28x28 mm (brown segment without tail) The tail is 12mm long
The area of the 4 segements have about the same size.
Does anyone has experience with implementing sliders and if this idea of mine can be functional?
The capacitive foil will be covered with a 3mm thick acrylic overlay.
I am looking forward to your reply/comments/improvements/recommendations!