The KY-019 1 Channel Relay Module is designed for switching high-voltage or high-current loads safely using low-power digital control. It uses an optocoupler for electrical isolation, protecting microcontrollers from voltage spikes. Ideal for smart home, automation, and IoT projects, this module provides reliable switching performance for devices like lights, motors, and pumps. Features 1-channel relay with optocoupler isolation Triggered by low-level logic signals (5V) LED indicator for relay status Capable of switching AC and DC loads Compact and easy to integrate Applications Smart home automation Motor and light control IoT switching systems DIY electrical projects Signal isolation for control circuits

The 2 Channel Relay Module enables independent control of two AC or DC loads using a microcontroller. Featuring optocoupler isolation, it ensures electrical safety and system stability. It’s ideal for projects that require simultaneous control of multiple devices such as fans, motors, and lights in automation systems. Features Dual-channel design for two load controls Optocoupler isolation for safe signal control Low-level trigger compatible with 5V logic Built-in relay status indicators Screw terminal connectors for secure wiring Applications Home and industrial automation Dual device control systems IoT projects Motor and lighting control Smart robotic control panels