Filament Roller IR Sensor Version 1

Addendum (2017/01/23):
A Kickstarter campaign for this product is live:
https://www.kickstarter.com/projects/522476987/filament-roller
Make a donation and receive a finished Filament Roller. Thanks for your support~
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Addendum (2016/11/13):
If you have a printer that can print 12x16 or larger, please visit version 2 of this thing at: http://www.thingiverse.com/thing:1888159. Thanks!
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Addendum (2016/11/27):
If you want an inline roller that you can position closer to your extruder separate from your spool, please visit version 3 of this thing at: http://www.thingiverse.com/thing:1904929. Thanks!
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Are you tired of nozzle clogs? Jamming? Filament grinding? Motor stalling? Tired of babysitting your printer, making sure it doesn't stop feeding filament?

This prototype Filament Roller can detect direction and speed of the filament spool using zero-friction optical IR sensors. If the spool rolls too slowly or stops, the board emits an alarm. This early-alert prevent