KY019 5V single-channel relay module with a platinum shield. 1 piece per order. What it is - A relay interface that lets a 5V logic signal from a microcontroller switch a higher-power load. Why you need it - Safe control of motors, lamps, pumps, or other devices from a low-voltage controller. - Isolation between the control circuit and the load helps protect your microcontroller from load transients. - Platinum shield helps reduce electrical interference and keeps control signals cleaner. Key attributes - Input voltage: 5V - Channel: single - Shield: platinum shield - Quantity: 1 piece Compatibility and use - Suitable for 5V logic devices and common microcontroller projects. - Easy to integrate into prototyping or small-scale embedded systems. Use scenarios - An Arduino or similar board switches a lamp or small appliance via the KY019 module. - A home automation setup controls outlets or fans through the relay for simple,on/off automation. - Educational experiments to learn relay control, signaling, and isolation techniques. Performance - Reliable 5V operation with a single relay channel, packaged as a single-piece module for straightforward installation.