FM strength Measurement??

[buts101]

I want to build a simple strength meter which can measure the signal

strength of FM stations in my city(different places in the city) for project, which is in a week.

So, please help me with the circuit and tell me how can i display the

strength reading digitally. Please tell me how can i vary the frequecy

so that i can measure the strength for different FM stations.

 

[flatulent]

You will need to build or buy a portable FM broadcast receiver. Then there should be some output from one of the IC pins that is the log of the signal strength. Then makd a digital volt meter with an ADC.

 

[aryajur]

Why is there a log output from the IC? Is it an inherent part of the FM demodulation?

 

[flatulent]

It is usually built that way so that the signal strength meters have a wider dynamic range.