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Aexit 5V High/Low Computer Components Level Trigger Opto-Isolator 2-CH Power Relay Motherboards Module Board: Amazon.com: Industrial & Scientific
NOYITO 1 Channel Relay Module with Isolated Optocoupler 5V 12V 24V High Low Level Trigger Module Triggered (Pack of 3) (5V, Red): Amazon.com: Industrial & Scientific
Amazon.com: Electronics123.com, Inc. 4 Channel Opto-Isolator on DIN-Rail Mount : Toys & Games
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AEDIKO 2pcs DC 12V Relay Module 4 Channel Relay Board Shield with Optocoupler Isolation Suport High/Low Level Trigger: Amazon.com: Industrial & Scientific
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Teyleten Robot DC 1 Channel Optocoupler 3V/3.3V Relay High Level Driver Module Isolated Drive Control Board 3V/3.3V Relay Module for Arduino (Pack of 5): Amazon.com: Industrial & Scientific
