How does a rain detector works
i think it detect the voltage left by the battery
Are you talking about Halo? If you are then the shotgun works fine.
I am not sure... But I would suggest using a metal detector. Hope it works!
pour a pitcher of water on a doll house
A homemade metal detector works better over sand. It works the Same both of them but it takes a longer time to find the metal in the soil. Try it at home just grab soil sanda radio and a calculator. Also a piece of metal .
The battery in a smoke detector should last a year (though the detector should be checked monthly). The detector works on "trickle" current that is always there. NiCads will lose more current than an alkaline battery from just sitting around - much more. Even a fully charged NiCad will usually not last a year in a smoke detector. Alkaline batteries will easily.
The Escort 8500 X50 is one of the best radar detectors available.
difference between detector and diode
Roosevelt Recession
geiger counter
"radar" is a palindrome for detector.