Microcontroller 8051 with PC interface

to work at home with ur computer u can use usb to serial converter

i hv dat but iy nt wrkng

may be out of order
buy a new for ur future work

hi majoka i short pin but em nt receiving any thng whn i sended character A
but shorting of 11 and 12 iz same as da shorting of 11 and 12 of max ?
i removed da 11 and 10 wire from max of controller thn i shorted pin 11 and 12 of max

i received same thng which em snding
whn shorting da 10 and 11 of controller
after removing controller

hi Maherbaloch

i received same thng which em snding
whn shorting da 10 and 11 of controller
after removing controller

yes i was tell u to do this thing
now it is clear that problem is in controller site
now there is a possibility crystal frequency is not as it is mention on it so baud rate is not generating properly
change also controller may be that is some damage
try this code on ur harware

#include<reg51.h>
void main (void)
{
SCON=0X50;
TMOD=0X20;
TH1=0XFD;
TL1=0XFD;
TR1=1;

while(1)
{
SBUF='A';
while(TI==0);
TI=0;
}
}

im using another controller itz show ..... instead of showing A

now last option is ur crystal nothing else
change that
what value of crystal ur using

12.000
i hv 2 crystal bth gvg same

led wrking properly