A couple mounting plates to attach an Atom smoke alarm to aluminum extrusion or a NEMA17 motor. These tiny smoke detectors* are small (40mm diameter) and light enough (43g) to mount on a printer or extruder.
I had some concerns that the plastic fumes would trigger the alarm, but that hasn't been a problem so far. I haven't tried burning plastic to see how sensitive it is.
Update: The alarm did trigger once when printing transparent ABS. I doesn't seem to trigger consistently, but I'll probably move the alarm further from the extruder if it happens again.
1 - FIrst Alert Atom Smoke Detector*
2 - M5x8 Socket Cap Screw
Filaments: (full list can be found on thrinter.com)
-- Honeycomb Drone White ABS
Rafts: Doesn't Matter
Supports: Doesn't Matter