is this schematic correct?

i will interfaced n3310 with 16f877,,, is this a correct circuit,, can this work?[/img]

Afaik this display is 3.3V only? So most probably you'll blow it @ 5V
Here's a comparable project with PIC16F628 and Nokia 3310.
Schematic and Board in Eagle are also provided. Take a look at it:
https://www.mikrocontroller.net/attachment/3464/Minniterminal.zip

why you are using 5 volts supply to the lcd ,layman knows in a cell phone max voltage inside cell phone is 4.2 volts when fully charged and this is regulated to circuit board lcd uses 3.3 v

thanks for the help,,, if i will change the supply for LCD can this circuit work properly????

you have to put one led in series from 5v to lcd 5v input (series)

i have searched this code in the net,, can you please make a schematic out of this PIC BASIC pro program,using 16f877 and nokia 3310,,,

' This program uses the */ operator to scale the ADC result from 0-1023
' to 0-500. The */ performs a divide by 256 automatically, allowing math
' which would normally exceed the limit of a word variable.

' Connect analog input to channel-0 (RA0)

' Define LOADER_USED to allow use of the boot loader.
' This will not affect normal program operation.
Define LOADER_USED 1

' Define LCD registers and bits
Define LCD_DREG PORTD
Define LCD_DBIT 4
Define LCD_RSREG PORTE
Define LCD_RSBIT 0
Define LCD_EREG PORTE
Define LCD_EBIT 1

' Define ADCIN parameters
Define ADC_BITS 10 ' Set number of bits in result
Define ADC_CLOCK 3 ' Set clock source (3=rc)
Define ADC_SAMPLEUS 50 ' Set sampling time in uS

adval Var Word ' Create adval to store result

TRISA = %11111111 ' Set PORTA to all input
ADCON1 = %10000010 ' Set PORTA analog and right justify result
Low PORTE.2 ' LCD R/W line low (W)
Pause 500 ' Wait .5 second

mainloop:
Adcin 0, adval ' Read channel 0 to adval (0-1023)
adval = (adval */ 500)>>2 ' Equates to: (adval * 500)/1024

LCDOut $fe, 1 ' Clear LCD
LCDOut "DC Volts= ",DEC (adval/100),".", DEC2 adval ' Display the decimal value
Pause 100 ' Wait .1 second
Goto mainloop ' Do it forever

End

please help,, thanks

please help,, thanks

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don't use anything that you don't understand.