i'm going to take a weak signal amplify it then calculate the frequency on an analog pin... accuracy is kinda important eg... if a 30hz frequency.... 60hz so if it shows 28-32hz each frequency represents a different user/id... simple as possible as i intend on using an attiny85 as the signal gener…

frequency counter? but...

system October 29, 2012, 11:38am 3

Configure one timer as a counter for the pulse and another as time base.

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