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3.3V 4 Channel Relay Module High and Low Level Trigger Dual Optocoupler Isolation 3.3V Relay Module: Amazon.com: Industrial & Scientific
Amazon.com: Electronics-Salon 4 DPDT Signal Relay Module Board, DC 12V Version, for Arduino Raspberry-Pi 8051 PIC. : Electronics
Amazon.com: AOKLEY 5V 12V 24V Relay Module with Optocoupler Relay Output 1 2 4 6 8 16Way Relay Module 1Pcs (Color : 12V, Size : 2 Way) : Industrial & Scientific
R223C16 16-Channel Relay Board DB9 Relay Module Female Interface Serial Port Smart Module for Parallel Industrial Electronics: Amazon.com: Industrial & Scientific
New 5V 10A USB 8 Channel Relay Upper Computer ICSE014A 8-Channel Relay Module: Amazon.com: Industrial & Scientific
1Pc Relay Network Ethernet Relay Controller Module Control Board LAN WAN Network Web Server with RJ 45 Interface + 8 Channel Relay Module for Smart Home Remote Control: Amazon.com: Industrial & Scientific
Amazon.com: CANADUINO® 4 Relay Module 10A / 250V Opto-Isolated Inputs 3-24V for Arduino etc. : Electronics
Amazon.com: 2PCS 4 Channel 12V Relay Module with Optocoupler High or Low Level Trigger Expansion Board for Raspberry Pi Arduino STM32 Red : Industrial & Scientific
Amazon.com: KNACRO SLA-05VDC-SL-C 4 Channel Relay Module DC 5V with optocoupler Isolation Support High Level Low Level Load 10A AC 250V DC 30V (DC 5V 10A, 4-Channel) : Electronics
