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Donald Papp developed a simple but loud alarm, "Mister Screamer", that is hanging from your filament and if the filament runs out it triggers a loud alarm.Key features:
- If filament is present, nothing happens.
- If filament runs out, scream your fool head off to alert a nearby operator.
- Enclosure can be 3D printed
- Self-contained (no external power or signals)
- Requires no modifications to the 3D printer to be monitored
- Electrically simple, and using a minimum of easy to source parts
- Long battery life, low power usage
- Easy to turn off when responding to an alarm
Source with the build guide:
http://hackaday.com/2017/06/07/improving-mister-screamer-an-80-decibel-filament-alarm/
All the files can be found at:
https://github.com/DPHAD/Mister-Screamer-Filament-Alarm
