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First layer keychain USB Light
by NoMercy06
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Simple use of keychain USB light and USB switch cable to help observe first layer without mounting it on extruder.
![Vertical LED Light Bars using 16x9.28 aluminium profile for the Prusa i3 MK3S/MK3S+ [Fusion 360 source]](https://wsrv.nl/?url=https%3A%2F%2Fmedia.printables.com%2Fmedia%2Fprints%2F239792%2Fimages%2F2168260_80e98c9f-4a32-4be0-84d1-ea7f458d9ad8%2Flightbar-vertical-arm-3.jpg&w=400&h=300&fit=cover&output=webp&q=80)
![push button for LED Light Bar [Fusion 360 source]](https://wsrv.nl/?url=https%3A%2F%2Fmedia.printables.com%2Fmedia%2Fprints%2F237401%2Fimages%2F2150416_0e477c6a-4d03-49ea-9340-8233bdba55cd%2Fpush-button.jpg&w=400&h=300&fit=cover&output=webp&q=80)
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