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Amazon.com: 2 pcs 5V 2 Channel DC 5V Relay Module with Optocoupler High/Low Level Trigger Expansion Board : Industrial & Scientific
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Amazon.com: HiLetgo 2pcs 5V One Channel Relay Module Relay Switch with OPTO Isolation High Low Level Trigger : Industrial & Scientific
Excelity 2 Channel DC 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM - Amazon.com
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Solid State Relay Module, Ultra-Thin 6.2mm Input DC to DC Normally Open MRD-060D2 Relay Module for Pneumatic DC Electromagnetic Valve Dc Solid State Relay Output: Amazon.com: Industrial & Scientific
Amazon.com: SainSmart 2-Channel Relay Module : Automotive
Amazon.com: SainSmart 16-Channel 12V Relay Module Board for Arduino DSP AVR PIC ARM : Electronics
IIVVERR Groove Optocoupler Sensor Measurement 1-Channel Power Relay Module ( Módulo de relé de potencia de 1 canal de medición de sensor de optoacoplador de ranura - - Amazon.com
16 Channel Relay Module Walfront Two Way Isolated Type Optocoupler 16 Channel Relay Module Interface Board High/Low Level Trigger DC 5/12/24V 3 Types Optional(DC12V): Amazon.com: Industrial & Scientific
