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WEB LAN Ethernet IP Eight Channels Relay Controller with Clips for DIN Mount Rail | Relay, Electronics projects, Channel
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KMTronics USB 4 channel relay board housing by astro3DPman | Download free STL model | Printables.com
GitHub - andrewmichaelsmith/kmtronic-usb-relay-pi: Code to use the KMTronic (http://kmtronic.com/) USB Relay Board v2.0
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