They say a fish isn't aware of the water. Are you aware of the air? How about tectonic plates? Or temperature? Maybe sound waves or vibrations? Can you sense the truck a block away? With this simple device you can see the movement of the earth, the traffic in the street and the footsteps down the hall. The very clouds passing over your home will make it react. I cannot really convey how crazy sensitive it is. Point it down a hallway or across a basement and wonder at the invisible world of sound, pressure, vibration and temperature that surrounds you.
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Step 1: Print
Step 2: All
Step 3: The
Step 4: Parts
Step 5: Assemble
Put a balloon over an empty soup can.
Step 6: Slide...
Step 7: Together
Step 8: Add Hinges
Resistor legs work well.
Step 9: Ready.
Step 10: Done
Push the laser's button and slide it into the ring. The ring will keep the laser on.
Step 11: Target
Point it at a scale and watch the invisible world that surrounds you. The longer the distance the more the beam will sweep. A gym, warehouse or football field is ideal. Be cautious. Just touching the can will make the laser wildly swing from the heat of your hand. Drill a hole in the can if you only wish to see vibrations like if you live near a fault in the earth's crust. Calibration is not included. Files can be downloaded for free here or at
I hope you find this useful.
Pardon the delay for files. I'm new here and it took a while to figure out. The ring prints upside down. Everything prints without support. I recommend a brim when printing. I used blue 1.75mm PLA from Reprap warehouse in Edmonton Alberta Canada and a .4mm nozzle. My printer is a plywood Repstrap I call "Monkey S#!t Fight" The file "laser barometer complete" is all the parts plated to print the entire barometer at one time. The parts are also available separately.