What kind of module can detect RF from a cell phone? It's OK if it also detects other RF too, a false positive. It does not need to be sensitive. I'd like it to work up to 5ft away. Would be great if it had an output which goes high when there is a signal. This way I could use Arduino to differentia…

Detect RF from cell phone

system September 26, 2012, 1:14am 5

We've all heard it come thru our stereo speakers. Because of the long wire?
There must be an easy way to take advantage of this issue. Ideas?

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