Filament runout sensor
thingiverse
To use this, you'll need: 1 mechanical endstop like in the picture shown. I purchased one from Aliexpress at https://pl.aliexpress.com/item/1pcs-lot-High-Quality-Mechanical-Endstop-For-Reprap-ramps-1-4-3D-printer-With-independent-packing/32622912889.html?spm=a2g0s.9042311.0.0.OzYORn 2 m3 screws are also required. The sensor is connected to the X+ endstop. You have to enable the filament runout sensor option in your firmware and select the correct pin for it.
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