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ok, what are you trying to do? How did you get to know that 555 is not generating the signal? Show me pics of your circuit...
sorry for not replying, actually you must have the Photodiode and the LED parallel to each other, see any normal line follower design, plus your leds and photodiode will be attached on the other side of the board
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sorry, i cant give it to you...haha its already in the instructable :D
sorry about that,Q0,Q1,Q2 are the outputs of the decade counters. if you see the datasheet of 4017. First time clock is given to 4017, it gives output on Q0, on next clock, output shifts to Q1, and so on.
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