weird problem with16X2 lcd?

[Eli]

guys i followed ur tutorial on interfacing 16×2 LCD with 8051.im facing a very weird problem where in  i see differrent characters after each reset 

all the connection are same as in the tutorial but im using AT89s52 and i grounded the contrast pin this the only difference is muc defective or my LCD 

please help guys im frustrated here

[Mrunal Ahirrao]

Don’t Worry! There won’t be any problem in MCU but may be in LCD! try changing LCD. Or follow the link below:http://lcd-linux.sourceforge.net/pdfdocs/lcd1.pdf and http://lcd-linux.sourceforge.net/pdfdocs/lcd2.pdf. here are tutorial on checking LCD.

 

[AJISH ALFRED]

 

Please post the link where you find the tutorial.

[Eli]

http://www.engineersgarage.com/microcontroller/8051projects/interface-lcd-at89c51-circuit this is the tutorial where A is to be displayed on the lcd.In my case  sometimes A is displayed while sometimes C and also after displaying characters it disappears

[Eli]

guys i have been successful in display the character A but it stays for a second only

 

[Amrith]

Hi eli,

You might be clearing LCD after dispalying the character.Do not clear the LCD unless you want to display other character.

[chitra]

hi Eli

i had this problem once.there was problem in my s/w delay.

check out it. and there should be very ltl delay while switching betn enable pin. 

[Author]

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