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SainSmart USB 4 Channel DC 12V Relay Module Automation for Arduino Raspberry Pi DSP AVR PIC ARM: Usb Relay Board: Amazon.com: Industrial & Scientific
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8 Channel 24V USB Relay Board Module Controller (USB Controlled Module) - Arduino, Raspberry Pi, NodeMCU, IoT, Nvidia, Lora, AI, Machine Learning, Teensy, Lidar, SenseCap, SenseCap M1 : Inspired by LnwShop.com
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5V 16 Channel USB Relay Module Computer Switch Control, USB Control Switch PCB Board/High Sensitivity : Amazon.ca: Industrial & Scientific
GitHub - andrewmichaelsmith/kmtronic-usb-relay-pi: Code to use the KMTronic (http://kmtronic.com/) USB Relay Board v2.0
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