The lower limit on the built-in tone() is 31 Hz for the 8 bit timer, timer 2. If you use the Tone library, you can get down to 1 Hz on the 16 bit timer(s).
http://code.google.com/p/rogue-code/wiki/ToneLibraryDocumentation#Ugly_Details
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The lower limit on the built-in tone() is 31 Hz for the 8 bit timer, timer 2. If you use the Tone library, you can get down to 1 Hz on the 16 bit timer(s).
http://code.google.com/p/rogue-code/wiki/ToneLibraryDocumentation#Ugly_Details
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