Electronics board based on PIC microcontroller

This project was awarded to mostafakhayati for $55 USD.

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Project Description

I need someone to make the design, layout, advice on components of a piece of electrocic and if possible make a prototype.
I have some knowladge about electronics but not enough for this kind of project.
I prefer PIC as the microprocessor.
What I need is simple: the hardware will take as input an audio signal, will make a Zero Crossing Rate and save the output on a micro SD card.
The hardware will always make the ZCR once per minute during 15 seconds.
It is an easy project for someone who has solid backgroud in electronics.
I need you too to program the pic.
So in all, I need a ready made solution, I can make the production of the prototype by myself.

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