RJ-45 Ethernet Round Panel Mount Adapter Plug cubes Logic Level Compatibility: It works

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and there are driver chips like the MAX7219 that can control a matrix for you but there's a lot of wiring to set up and they take up a ton of space

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Each order comes with a fully assembled and tested PowerBoost 500C

RJ-45 Ethernet Round Panel Mount Adapter Plug cubes Logic Level Compatibility: It worksIf you need to add a panel mount connection for Ethernet, but don't have the time or ability to cut a custom oval or square hole, this RJ 45 Ethernet Round Panel Mount Plug is the easiest and fastest way to panel ify your existing Ethernet kit. It's about 30mm in diameter, so you can drill a hole in your wood, plastic or metal with a common hole saw or bit, no special shapes or filing required. Un screw the plastic nut, insert the plug and re attach.