Diy Barometer. Place a plastic bottle upside down inside the cup. Bring your diy barometer up next to this piece of paper for the next step.
A plastic soda or water bottle with lid, size not important! Air tubing, such as from an aquarium or oxygen use about 1 3/4 the length of the bottle. (it should fit snugly, but should not be airtight.) the mouth of the bottle must be below the waterline but not touching the bottom of the cup.
Make this Awesome DIY Barometer And Predict Daily Weather Accurately
Supplies items needed to make this barometer are: Place arrows pointing up and down, above and below this mark as shown (sunny on the up arrow and cloudy on the down arrow). Add a few drops of food coloring to the water. Graphical lcd displays latest 128 readings while one reading occur once in 20 minutes.
