Peel from the case to the element. Follow the readout through this conceptual model.
Drag to rotate; pinch to zoom. With the view focused: arrow keys rotate, + / − zoom, 1–3 choose a layer, Home resets rotation and zoom. Step advances to the next layer; Reset returns to the case and default view. Layer buttons select a view directly. The page does not move on its own.
The pad-on-board layout is conceptual; the source describes a capacitive plate sensing field disturbance. [Photons In, Current Out: capacitive field disturbance]
Teaching view: The conceptual red board carries a circular touch area, with a removable red centre marking. No pale cover is shown; pad and internal details are illustrative.
The circular metal pad is an electrode, a conductor connected to the sensing circuit. Its shape and position on the board are simplified for teaching. [Photons In, Current Out: capacitive field disturbance]
Teaching view: The red board carries a circular touch area with a red centre marking. The pad and internal arrangement are simplified for teaching.
A finger near the electrode changes the surrounding electric field. This changes how much electric charge the electrode stores at a given voltage, which changes its capacitance. The controller measures that change. [Photons In, Current Out: capacitive field disturbance]
Teaching view: The copper-colored electrode sits on a red printed circuit board. A controller sits on the reverse side, with pins for electrical connections. The arrangement is simplified for teaching.
A capacitance change can indicate touch or a nearby conducting object. It cannot identify who touched the pad or directly tell you the object’s distance. [Photons In, Current Out: capacitive field disturbance]
Teaching view: The circular electrode connects to the touch controller. The controller compares its capacitance reading with the no-touch baseline. In this teaching example, it reports a touch when the change exceeds a chosen threshold.
Explode separates the conceptual layers; X-ray makes the case translucent. External package dimensions follow the model specification; internal teaching geometry is conceptual, not to scale, and is not manufacturer CAD or a wiring diagram.