pic16f877a and lcd - reacts when touched

[sivaramakrishna]

pic16f877a and lcd

hai to all,
Iam using pic16f877a and 16 x 2 lcd to display my string as an array.

The problem is when i touch the crystal legs, I could find the characters display steadily or else the display is flickering. I use a 4mhz crystal. I even grounded the body of the crystal. But eventhen the problem occurs. I use 33pf decoupling capacitors for the crystals.

Please help me out.
thanks
siva.

 

[bobliin]

pic16f877a and lcd

I think the problem is with the LCD circuitry.
Check whether the pins that are to be grounded are done properly and check the contrast circuitry (on PIN3 of LCD).

Hope this ll help

Bhargav

 

[hameeds01]

Re: pic16f877a and lcd

change ur crystal & connect the MCLR pin of pic directly with +5v