Analog Input Waveform

[Tanner R Smith]

Hi all,

I'm looking at the arduino for a little project of mine, but I'm not sure if the arduino will work for me.

What I need to do is analyze a waveform (sine wave not reaching higher than ~1000hz) and get the frequency and amplitude?

Could this work on arduino? Is the sampling rate of the analog inputs fast enough?

Thanks
-Tanner

[Papabravo]

The ATmega328 datasheet allows a fairly wide range of clockspeeds for the A/D converter.  You can always trade speed for resolution.  It lists conversion times in the 13-260 microsecond range.

[retrolefty]

Analyzing the frequency will be the more difficult part. Not only do you require sufficient sampling speed but also a lot of hefty math functions. The 8 bit AVR chips may not be the best choice for that kind of application. There are micro-controller chips from TI and PIC that have special purpose DSP hardware on chip and are a better match for this kind of stuff.

Not saying it can't be done on a Arduino, but I'm sure it won't be a walk in the park getting the code to work.  

Lefty