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PIC16F877A Based MMC Voice Recorder

Table of Contents:

  1. PIC16F877A Based MMC Voice Recorder
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Description

Comments

Nice project :)

 

I also tried something similar, but the result wasnt so good.

 

I think you may improve the circuit by adding a 220K resistor between 5V and analog in

 

Anyway, the sound quality is impressive for PWM :) what frequency did you use?

i am learning microcontroler programing at home can u hralp me

 

Yes you are right, that pre amp is not properly designedno.

 

 

Now about the PWM:

 

I used,

T2CKPS1=0;

T2CKPS0=0;
PR2=0x50;

 

So,

PWM frequency = Fosc / [(PR2 + 1) * 4 * (TMR2 Prescale Value) ]

 

ie PWM frequency =  20,000000 / [81 * 4 * 1]

                               =   61728.39506 Hz

                              ~=  61.7 KHz

hope the calculation is correct..:)

great, very very interesting, can i design simple audio player without accessing fat files.

 

awesome project.

i am also interested in such kind of thing.

sir can u give me some tips or changes in ur code that shoud i make to read mmc and display it on lcd

hi,

  i am doing a project in which i have to store data in micro sd card . I am using pic 18f25k22 and micro c compiler in that it is not able to write at micro sd card but function is returned write successful and read successful can any on suggest me what i have to do with sd card before writing.actually already formated in Fat16 .i am using san disk memory card.

very good work

How can I get code of this project? I have need of sd card code with spi for pic series.

cool bro thanks for everything.

Please send me the code

gretech96@gmail.com

 

Great project. Can you provide the Source please to samimi_it@yahoo.com

many thanks

it is a best project for me. But i want 24 hours mode rtc1307 clock and alarm with this circuit. please 

send me source code for it to my email  smnmanian@gmail.com.    thanking you

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