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the following project will show how you can use a laser pointer to hear noises from hundreds of feet away (the distance will be relative to the strength ...
We need 1. a laser pointer 2. a old pair of headphones (mic cable with stripped ends) 3. cadmium sulfide photocell (avaible at radioshacks) 4. 2 Tripods 5. ...
twist the photocell wires around the stripped ends of the mic cables
1.first plug in the mic cable into the laptop. 2.notice the audio meter when the light hits the cell.
1.Attach The Photocell To Tripod #1 2.Set Laser To Tripod #2
1.Adjust Laser Until Reflected Beam Hits Photocell. 2.let the rays of laser reflect on a mirror or a glass to hit the photocell. 3.Now just hit record and ...
1.Find a room with a window you'd like to spy on, and aim the laser at the window at an angle. 2.Determine where the laser reflects, and situate ...
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