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December 19, 2015 at 11:11 am #11928
I connected power supply like that only.Ground was common. But that was not the problem.I connected back the supply as earlier in parallel.
As you said, problem was that ripples.When I connected a 1000uf(25V) capacitor in parallel with Vs Pin(12V) and the Ground pin of L293D, the problem was solved.
Thanks for your support.