Let's take a closer look at the inline filament diameter sensor - available for DIY now!
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Download the design and all files (Fusion source files, Eagle PCB design, Firmware) https://www.prusaprinters.org/prints/...
or https://www.youmagine.com/designs/inf...

Some of the parts required (full BOM at the links above)
SS495A linear hall effect sensor http://go.toms3d.org/SS495
ABEC-rated 623-ZZ bearings http://go.toms3d.org/623ABEC
6x2mm magnets on Amazon http://go.toms3d.org/6x2magnet
PTFE tube http://go.toms3d.org/bowden

Filament used:
Prusament PETG http://go.toms3d.org/Prusament

Firmware:
Daniel has uploaded the firmware to Github: https://github.com/drspangle/infidel-...
For now, this is the recommended repo to develop against if you want to contribute to the code.

Product links are affiliate links - I may earn a commission on qualifying purchases (at no extra cost to you)

Previous video about the filament spool diameter measuring device:    • How precise is your filament really?  

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