frequency counter? but...

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 generator...

ill use an uno to program on first.. im worried about using code not designed for the attiny ... thanks :slight_smile:

60 herts - person 1
100 herts - person 2
150… etc etc as long as the tolerance is a few above or below not a problem…

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

writing the code to send the pulse and interval, is straight forward enough (delay/digitalWrite,delay or led blink without delay, lot's of options...)...

but, has anyone seen any code to measure frequency? i'll adapt it if so :slight_smile: thanks...

but, has anyone seen any code to measure frequency? i'll adapt it if so

There is a FrequencyCounter library. Google will be hearing from you soon, I'll bet.

indeed they will :slight_smile: ty