Please clarify - are you looking for an application thatuses a sensor to·measure barometric pressure? There is an endless supply of sensors that you can use starting with Freescale's MEMS sensors in the under $10 range. Give us a few more parameters and we can offer you some advice.
I am involved in an animal behavor study to determine why animals sense lightning long before it approaches. My feeling is that they sense fluxuations due to changes in the electromatic field. Thus I am looking to purchase a barometer that will interface with the stamp 2. Also a lightning detection schematic that will also work with the stamp 2.
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Craig