where to bur from a ldr

[biginer_to_zenith]

i want to use ldr as sensor in line follower.
suggest a place near delhi(india) which offers ldr placed in a container such that light can only enter from below it.

 

[be80be]

you make it like this**broken link removed** **broken link removed**
just don't put a led in it like this pic shows but you can get the ideal