Filament Runout Sensor (1.75mm)

Yet another Filament Runout Sensor with PTFE Tube Support.

I designed this one, cause I had a bunch of those mechanical Endstopps!
It's compatible with the makerbot.com style mechanical end stops.

You get them from here as an example:

https://www.banggood.com/6Pcs-Mechanical-End-Stop-Endstop-Limit-Switch-With-Cable-For-CNC-3D-Printer-RAMPS-1_4-p-1073096.html?rmmds=search&cur_warehouse=CN
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The Video Tutorial is made by **brotherch