Cytron Technical Forum

I am new in C programming.

My project is using 16f877a + LED + LDR...

the description of the project is as below:
When its dark, LED blinking
When its light, LED off

coz of the tutorial only teaches me how to print the value of LDR in LCD.... i do not know how to relate the LDR to LED... can someone please help me in the source code? thanks

Since you know how to get the LDR value by referring to Cytron's tutorial, you can make use of that value. Eg:

CODE: SELECT_ALL_CODE

if ( LDRvalue >= 300 )
{
    LED = 1;
    delay();
    LED = 1;
    delay();
}
else
{
    LED = 0;
}

This depends on how you connect the LDR. I don't know how Cytron connects it in their tutorial. You should check. So it could be >= any value OR <= any value...