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
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Operates with 5V control voltage
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Compatible with TTL control signals
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Can control AC or DC loads, including devices up to 220V AC
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Includes Normally Open (NO) and Normally Closed (NC) contacts for flexible wiring
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Power LED indicator shows module status
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Control LED indicator lights when the relay is activated
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Transistor driver circuit provides stable operation and protects the microcontroller
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Built-in pull-down resistor prevents accidental triggering
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High-impedance control pin for reliable performance