arduino baby phone

In this post I am going to present you the prototype of my arduino based baby phone. It is based on the wireless inventors shield. It consists of two parts: the loudness sensor board and the led indicator board:

Both are built on top of an arduino and a wireless inventors shield. The loudness sensor part has a grove loudness sensor. The loudness level is transmitted to the indicator board. This board is equipped with a colors shield and a led matrix. If the loudness level that is received is below a pre-defined threshold, the led matrix is green:

If the loudness level is above this threshold, the matrix turns red:

The signal transmission worked quite well in my flat but the loudness sensor did not do a good job in catching high frequencies ... quite bad for a baby phone :).