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Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics
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Amazon.com: ARCELI 5PCS KY-019 5V One Channel Relay Module Board Shield for PIC AVR DSP ARM for Relay : Electronics
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Amazon.com: Dual 2 Port USB 3.0 ExpressCard Adapter 5Gbps USB HUB ExpressCard 54mm Slot Express Card PCMCIA Converter for Laptop Notebook PC : Electronics
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Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics
Amazon.com: StarTech.com 2 Port Flush Mount ExpressCard 54mm SuperSpeed USB 3.0 Card Adapter with UASP - Dual Port Laptop ExpressCard USB 3 Controller (ECUSB3S254F) : Everything Else
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Amazon.com: Lystin 8 Channel DC 5V DC 230V Relay Module Control Board with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR TTL Logic STM32 Raspberry Pi : Electronics
Amazon.com: Lystin 8 Channel DC 5V DC 230V Relay Module Control Board with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR TTL Logic STM32 Raspberry Pi : Electronics
Amazon.com: SainSmart USB Eight Channel Relay Board for Automation - 12 V : Industrial & Scientific
Amazon.com: DSD TECH SH-BT01C Bluetooth Relay V2 Support Timer and Security Code for iOS and Android : Electronics
Amazon.com: USB Relay Module USB Intelligent Switch Control MCU PC USB Smart Control Switch Jog Self-Locking : Electronics
QWORK Time Delay Relay, Relay Module DC 6-30V Delay-Off Cycle Timer, 0.01s-9999mins Adjustable Trigger Delay Switch Control with LCD Display Support Micro USB 5V Power Supply: Amazon.com: Tools & Home Improvement