I wanted to ask you if it is possible to use two Arduinos as wireless baby monitor?
What I mean: - using microphone on one Arduino and receiver on the other - using transmitter on one Arduino and receiver on the other (one-way is good enough)
I have to make a choice now - either buy normal monitor for ~100$ or make one myself. I think I can do it cheaper and after baby got older I could scavenge it for another use.
Questions: Is Arduino (Duemilanove, Mega, which one?) capable of transmitting sound on-the-fly? There shouldn't be problem with making some kind of regulation of sensitivity when Arduino starts transmitting... Can this be done with cheap electronics (like 433MHz TX/RX modules for 2$ each) or do I have to use some kind of xxBee shield? I prefer less in/out pins used (everybody does, I suppose). What would you recommend to me? I will probably use Arduinos for wireless meteo station afterwards or some kind of RC control (lights, garage door, ...), bear this in mind when you answer this question, please.
Thank you for your time and for any answers on this subject.