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Amazon.com: HiLetgo 12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger : Industrial & Scientific
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Amazon.co.jp: 2 Channel Time Delay Relay DC 12V Time Delay Relay 4 Channel RS485 Deray Timer Switch Relay for Arduino R3 : Industrial & Scientific
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Amazon.com : UCTRONICS DC 12V Time Delay Relay Module for Smart Home, Tachograph, GPS, PLC Control, Industrial Control, Electronic Experiment, Arduino Robot : Electronics
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Amazon.com: AITRIP 2Pcs 4 Channel DC 12V Relay Module with Optocoupler Isolation Relay Control Board Compatible with Arduino UNO R3 Raspberry Pi DSP AVR PIC ARM : Industrial & Scientific
kwmobile 2 Channel Relay Module - 5V Relay Board for Arduino Raspberry Pi with Optocoupler - Pack of 3 : Amazon.co.uk: Electronics & Photo
SainSmart 16-Channel Canal 12V Relay Relais Module pour Arduino DSP AVR PIC ARM : Amazon.fr: Informatique
4 Channel 12V Relay Module with Optocoupler High Low Level Triger for Arduino : Amazon.co.uk: Automotive
