1-Channel 5V Relay Module (KY-019) ✅ Overview The KY-019 1-Channel 5V Relay Module allows low-voltage microcontrollers such as Arduino, Raspberry Pi, and other development boards to safely control high-voltage devices. It is ideal for home automation projects, appliance control, robotics, and DIY electronics. 🔧 Key Features Operates with 5V control voltage Compatible with TTL control signals Can control AC or DC loads, including devices up to 220V AC Includes Normally Open (NO) and Normally Closed (NC) contacts for flexible wiring Power LED indicator shows module status Control LED indicator lights when the relay is activated Transistor driver circuit provides stable operation and protects the microcontroller Built-in pull-down resistor prevents accidental triggering High-impedance control pin for reliable performance
