Smart lighting uses digital protocols for automated control, enabling features like individual fixture addressing, light scenes, and two-way communication for status monitoring. It integrates with smart home systems via protocol converters. Benefits include enhanced comfort through predictive lighting and biodynamic cycles, increased energy efficiency, and new functionalities like voice control and AI-driven automation that learns user habits.
Analog protocols 0-10V and 1-10V, developed in the 1970s, are still used for dimming LED and fluorescent lights. 0-10V uses 0V for off and 10V for 100% brightness. 1-10V uses 1V for minimum dimming and 10V for maximum, requiring a separate switch for power. While signal degradation limits long-distance use, their low cost makes them prevalent in hybrid systems and for street lighting via standardized connectors.
A weight sensor, or load cell, uses strain gauges bonded to a bending beam. Their electrical resistance changes minutely when force is applied, stretching or compressing them. These gauges are arranged in a Wheatstone bridge circuit, producing a small voltage change. This signal is amplified and converted to a digital reading by an integrated circuit like the HX711, which a microcontroller can then interpret as a weight measurement.
LEDs enable efficient automatic lighting control since their lifespan is unaffected by frequent switching. Simple systems include photo relays reacting to ambient light, acoustic sensors activated by noise, and motion sensors detecting movement through infrared or microwave technology. Each option has cost, accuracy, and use-specific advantages and limitations.
Human-Centric Lighting (HCL) mimics natural light variations throughout the day to enhance productivity, reduce errors, and improve health. It adjusts light output and color temperature based on specific programs. Two approaches exist: one mimics sunrise and sunset, and the other aligns with the workday. Implemented via tunable LED fixtures and controlled by protocols like DALI-2, HCL can use cloud or local systems, applicable in various environments.
