Kommentare

Hi shantanushiv,
I think the problem are your sensors labeled with sm3800. What type is it? I could not find a datasheet to it.

The circuit I used and modified is from here: http://www.beam-wiki.org/wiki/Herbie_line_follower

I used SFH205F IR-Photodiodes as sensors. SFH203FA or others should also work. My Trimpot is 50kOhm. Try also 100kOhm. You should also play with different resistors instead of the bridge between Pin 1 and 8 of the LM368. It makes the response of the follower more or less sensitive.

But first of all find suitable IR-Photodiodes.

Best regards
Searcher