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Amazon.com: Qunqi 5V 2 Channel 5V Relay Module with Optocoupler Low Level Trigger Expansion Board Compatible with R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi (2channel-4pc) : Electronics
Amazon.com: ACEIRMC Time Delay Relay DC 5V 12V 24V Delay Controller Board Delay-Off Cycle Timer 0.01s-9999mins Trigger Delay Switching Relay Module with LCD Display Support Micro USB 5V Power Supply (2pcs) :
Amazon.com: 12Pcs 5V DC Mini Power Relay Auto PCB Relay SRD-05VDC-SL-C Power Relay 5 Pins DC Power Relay PCB Mount Electric Relay for Universal Household Appliance : Automotive
NOYITO 4-Channel Relay Module 5V 12V 24V High Low Level Trigger with Optocoupler Isolation Relay Load AC 250V 10A DC 30V 10A (DC 5V, Red): Amazon.com: Industrial & Scientific
Amazon.com: [2-Pack] DC 5V Relay Module 2-Channel Relay Switch with Optocoupler Isolation High/Low Level Trigger : Industrial & Scientific
Amazon.com: 5vdc (5 Volt DC) Relay - DPDT PCB 8-Pin Mount - Non-Latching Non-Polarized Electronic Low Signal High Sensitivity Relay Module for DIY Electronics and Arduino : Industrial & Scientific
Amazon.com: DC 6-30V Digital LED Relay Board Cycle Timing Circuit Switch Timer Delay Trigger Module Micro USB 5V : Tools & Home Improvement
Amazon.com: HiLetgo 2pcs DC 12V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level Trigger Module Triggered by DC 12V : Industrial & Scientific
HiLetgo ESP8266 5V WiFi Relay Module TOI APP Control for Smart Home Automation System: Amazon.com: Tools & Home Improvement
Amazon.com: Valefod DC 5V Relay Module 1-Channel Relay Switch with Optocoupler Isolation High/Low Level Trigger, Pack of 10 : Industrial & Scientific
Amazon.com: HiLetgo 5V 1 Channel Self Locking Bistable One Button Start/Stop Self-Locking Relay Module Relay Switch for MCU Control : Industrial & Scientific
Amazon.com: NOYITO 2-Channel Micro USB Relay Module USB Smart Control Switch USB Intelligent Control Switch (2-Channel Micro USB) : Electronics
Amazon.com: Delay Timer Relay Self-Locking Delay On Off Time Switch Loop Module Super 555 Timer DC 5V/12V/24V(DC12V) : Tools & Home Improvement
Amazon.com: ACEIRMC 2pcs DC 6-30V Timer Relay Programmable Delay Relay Module Cycle Timer with LCD Display / 5V Micro USB, Smart Home Controller : Appliances
Amazon.com: 4 pcs DC 5V 1 Channel Relay Module Board Shield High/Low Level Trigger with Optocoupler : Industrial & Scientific
Time Delay Relay, 5V 12V 24V Delay Controller Board Delay Off Cycle Timer 0.01s-9999mins Trigger Delay Switching Relay Module with LCD Display,Module: Amazon.com: Tools & Home Improvement
Amazon.com: Gump's grocery Replcement for 4 Channel DC 5V Relay Module with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi : Electronics
5V DC Delay Relay Turn on/Turn Off Module, Delay Relay Delay with Timer Turn on/Delay Turn Off Switch Module (5V) - - Amazon.com
Amazon.com: HiLetgo 2pcs DC 5V Trigger Time Delay Switch Relay Module Adjustable Time Delay Control Swtich Trigger Delay Conduction Relay Switch Module Wide Voltage Delay Relay DC 5V-30V Micro USB Power :
Yosoo Fine DC 5V/12V Delay Relay Delay with Timer Turn on Delay Turn Off Switch Module (5V): Amazon.com: Tools & Home Improvement