PC817, 8 4 2 1 channel opto-isolator breakout Arduino optoisolator optocoupler

TLP281, 4 channel opto-isolator breakout for Arduino, optoisolator, optocoupler

4 channel opto-isolator breakout for Arduino optoisolator optocoupler ST

PC817 2 Channel Optocoupler Photocoupler Phototransistor Module for Arduino

PC817 2/4-Channel Opto-Isolator Breakout for Arduino Optoisolator Optocoupler

PC817 2-Channel 3.6V-30V Optocoupler Isolation Board Voltage Converter Module

PC817 4-Channel 3.6V-30V Optocoupler Isolation Board Voltage Converter Module

PC817 4-Channel Optocoupler Isolation Module 3.6-30V Phototransistor for Arduino