How to make two bulbs glow Alternatively?

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How to make two bulbs glow Alternatively?..

Answer / shankar

by using a capacitor and rely
or by using 555 timer
or by using two transister

Is This Answer Correct ?    8 Yes 1 No

How to make two bulbs glow Alternatively?..

Answer / manish kumar janagal

also by using a 1 phase alternator connected to 1-phase
supply in such a way that it's frequency is just less than
the supply frequency

Is This Answer Correct ?    2 Yes 0 No

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