- The 4-channel relay module board is ideal for controlling devices with DC power supplies of 5V, 12V, or 24V, making it versatile for various applications. - Equipped with an optocoupler, this module ensures enhanced isolation and protection for your circuits, safeguarding your components from voltage spikes. - It supports both high-level and low-level trigger modes, allowing you to choose the best control method for your project, enhancing flexibility in your designs. - Designed as a shield, the module easily integrates into existing projects without additional mounting requirements, saving you time and effort. - Its compact size is specifically tailored for 4-channel 12V applications, delivering an efficient solution for your electrical control needs. Practical Applications: - Use it to automate home lighting systems, enabling you to control multiple lights from a single module. - Implement it in industrial automation projects to manage machinery and equipment effectively. - Perfect for DIY electronics enthusiasts who want to create smart devices or experiment with circuit designs.