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5V 1 Channel H/L Level Trigger Optocoupler Relay Module For Arduino
The 5V 1-Channel Optocoupler Relay Module provides safe, isolated switching of high-voltage loads from a microcontroller. An onboard SMD optocoupler isolates...
The 5V 1-Channel Optocoupler Relay Module provides safe, isolated switching of high-voltage loads from a microcontroller. An onboard SMD optocoupler isolates the control circuit from the relay, protecting your Arduino, Raspberry Pi, or other development board from voltage spikes.
A jumper setting lets you select either high-level or low-level trigger, giving you flexibility to match your project's logic. A fault-tolerant design ensures the relay remains off if the control line is disconnected.
Key Features
- Optocoupler Isolation – SMD optocoupler separates control and load circuits for safety
- Selectable Trigger Level – Jumper to choose high or low level trigger
- Fault-Tolerant Design – Relay stays off if control line is disconnected
- LED Indicators – Green power LED and red relay status LED
- Maximum Load – AC 250V/10A or DC 30V/10A
- Trigger Current – 5mA
- Mounting – Four 3.1mm bolt holes for secure installation
- Compact Size – 50 × 26 × 18.5mm
Pin Connections
- DC+ – Positive power supply (VCC, 5V)
- DC− – Negative power supply (GND)
- IN – Control signal input (high or low level)
- NO – Normally open relay output
- COM – Common relay output
- NC – Normally closed relay output
Ideal For
- Home automation and IoT switching
- Arduino and Raspberry Pi projects requiring mains-voltage control
- Controlling lights, fans, pumps, and solenoids
- Industrial control prototyping
Package Contents
- 1× 5V 1-Channel H/L Level Trigger Optocoupler Relay Module
Jargon buster
Plain-language definitions for the technical terms used above.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
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