Measure frequency of sine wave as low as 200mv pk-pk. Frequency is normally at 50hz.
Generate interrupt to micro controller when the rate of change of the frequency is > [url removed, login to view] over 500ms.
Again we are interested in the Rate of Change not a hard upper or lower threshold.
The circuit must be adjustable to that we could chane the threshold from [url removed, login to view] to say 1hz/500ms
18 freelanceria on tarjonnut keskimäärin 90 $ tähän työhön
Hey I am an expert embedded software engineer. I have made many projects using many different micro controllers. Please contact me for more details.
Hi If you mean by micro controller "AVR Series" I am the right person to do the project. just tell me would you like it to be written in CodeVision or Bascom? I have 5 years of experience in AVR programming.
I have worked on Op-amp based circuits extensively. This concept is achievable. I need some more details, such as does frequency of sine wave will be interpreted by micro controller as count, or by analog.