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1PCS 1 2 4 8 Channel 5V 12V 24V Relay Module Board with Optocoupler Support High and Low Level Trigger for Arduino

1PCS 1 2 4 8 Channel 12v 5V Relay Module Board Shield with Optocoupler Support High and Low Level Trigger for Arduino red

Relay Module 1 2 4 6 8 Channel 5V 12V 24V Relay Module Board with Optocoupler Support High and Low Level Trigger for Arduino

4ch 3.3V 5V 12V 24V Digital Logic Level Converter Module Optical Isolation GPIO Module for Arduino Pi Pico ESP82 NodeMCU ESP8266

2pc 1/2/4/8 Channel 5v Relay Module With Optocoupler Relay Output 1 2 4 6 Relay Module 8 Channels Low Level Trigger Output XWay

1 2 4 Channel Relay Module 30A With Optocoupler Isolation 1 Way 5V 12V 24V Supports High And low Triger Trigger

1 2 4 8 Channel Relay Module 30A With Optocoupler Isolation 5V 12V 24V Supports High And low Triger Trigger 

50PCS PC817C PC817 817 EL817 5v Optocoupler IC Chip For Optocoupler Isolation Board

1 2 4 6 8 Channel 5V 12V 24V Relay Module Board Shield with Optocoupler Support High and Low Level Trigger for Arduino

1 Channel Way Optocoupler Isolation Module PC817 EL817 3V-5V 12V 24V Photoelectric Isolator Rail Holder PLC Drive Motor Board