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Hi,
I have been following this thread via Google Translator and I myself tried out this simple but impressive robot, but it turned out so well as one out of two motor is running continuously after giving supply while the other remains steady.
Also, I couldn't figure it out whether the IR pair is actually doing something or not as the motor is moving continuously.
It will be very grateful of all you experts especially Searcher, if you can enlighten me...
i do have attached ...

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