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1 Channel 12v relay module interface board that allows you to control various appliances, and other equipment’s with large current.

8Pack 1 Channel Relay Module 12v Relay Board with Optocoupler Support High/ Low Level Trigger for Arduino Relay

Valefod DC 5V Relay Module 1-Channel Switch with Optocoupler 1CH-5V-10

5v/12v 1/2/4/8 Channel Relay Module Optocoupler Relay Output - Temu

4-Channel Relay Module - 12V (High and Low Level Trigger)

Different Types of Relay Module Configurations

USB Relay Controller - High Power USB Relays for Industrial Applications

DIANN 12pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Support High/Low Level Trigger - Yahoo Shopping

1 Channel 12V Relay Module buy online at Best Price in India

5v/12v 1/2/4/8 Channel Relay Module Optocoupler Relay Output - Temu

It is 1 Channel Isolated 3V 10A Relay Module, each relay can individually switch on/off by an opto-isolated digital input, Standard interface can be

Relay Module with Optocoupler High/Low Level Trigger for Arduino (3, 3V Relay 1 Channel)

Sealed Relaysealed Voltage Relay Module 5v/12v 1-channel For Arduino & Diy Control