At normal listening distances, an array of twelve speakers arranged on the faces of a dodecahedron is a very good approximation of a point sound source, and the sound waves it produces are very close to perfectly spherical.
Using a light sensor, some wire, and LEDs you can easily create an automatic night light that will turn on when you turn off the lights.
Our Mission is to help seniors trim their toenails, since the majority of the elderly can’t because of aging problems like: Poor Vision/Eyesight, Flexibility Issues, Thick toenails, etc.
Infrared diodes and detectors make things fun and magical.
I’ve owned this 1933 Ensign Pocket 20 camera for 37 years and not taken one single solitary picture on it.
A modern method of removing paint from wooden surfaces is the use of infrared rays.
This is a beautiful Kusudama Ball.
