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4 channel 12v to 3.3v 5v PC817 input optoisolator optocoupler with connectors

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

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PC817, 8 channel opto-isolator breakout for Arduino optoisolator optocoupler ST

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1PCS 3.3V 5V 3 Channel Relay Module 5mA With Optocoupler Isolation Compatible Signal For arduino Board Module

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

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PC817 4 Channel Opto-Isolator Breakout For Arduino Optoisolator Optocoupler ST Voltage Control Switch Module Isolation Module

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