This is a 5V and 12V light photoswitch sensor switch that uses an LDR photoresistor for accurate ambient light detection. A built-in relay module allows it to function as a reliable light detection photosensitive sensor board, enabling direct control of connected devices in response to light changes. The unit is provided in a compact single-piece package for easy installation in a variety of circuits. Key benefits and features - Accurate light sensing: LDR photoresistor detects changes in ambient light with dependable triggering of actions. - Flexible voltage compatibility: supports 5V and 12V systems, enabling integration with common low-voltage control circuits. - Reliable relay output: the relay module provides straightforward switching of loads based on light levels. - Compact, single-piece design: streamlined form factor simplifies mounting and reduces enclosure space requirements. - Easy integration: ready-to-use sensor and switch in one package, designed for plug-and-play use in light detection and control applications. What it does - Senses changes in light intensity and triggers a connected load through the relay when light conditions meet the set threshold. - Provides a simple, automated means to switch devices on or off in response to ambient light without additional sensing modules. Specific use scenarios - Outdoor dusk-to-dawn lighting: automatically turn on exterior lights as daylight fades and switch them off as daylight returns, reducing energy use and manual operation. - Retail or display window lighting: adjust interior lighting based on daylight levels to maintain appearance and save energy in storefronts or galleries. - Greenhouse or shed automation: control supplemental grow lights or ventilation fans in response to ambient light, supporting plant health and efficient energy management. Why you need it - Automates light-based control, reducing manual intervention and improving energy efficiency. - Compatible with common low-voltage systems (5V and 12V), enabling integration with existing controllers and circuits. - Compact single-piece package simplifies installation and minimizes space requirements. - Reliable detection and switching provide consistent performance in varying lighting environments. Performance and suitability - Designed for applications requiring automatic light detection and load control. - The combination of LDR sensing and relay output delivers straightforward, dependable operation for a range of light-driven tasks. - Suitable for use in residential, commercial, and small automation projects where simple, reliable light sensing and control are needed.