Rain Drop Sensor Module

This sensor's exposed grid of parallel conductive traces changes its resistance the instant water bridges between them, and the paired comparator board converts that into both a scaled analog signal and a simple digital trigger once a set amount of moisture is detected. That immediacy makes it well suited to automatic window or skylight closers, car wiper activation demos, greenhouse rain-alert systems, and weather station rain-event logging, anywhere a project needs to notice rain starting rather than measuring accumulated rainfall over time. Because the exposed grid sits directly in the weather, it benefits from being mounted at a slight angle so water sheds off between readings rather than pooling and giving a false continuous-rain signal.