This story is about clouds of the water dropping variety. Transmitting data from a capsule dangling from a weather or sounding balloon is not easy as it often involves expensive and sophisticated equipment. Luckily, cheap alternatives exist. The board presented in this article together with a standard radio transmitter and GPS receiver can be used to beam down up to six analog signals and position data from a balloon, and all of that at very low cost. Our heads are not the clouds either—this project has been up in the air twice already!
 
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