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How does pulse oximeter works

How does Pulse Oximeter works?

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You are likely to have come across Pulse Oximeters if you have been to a doctor for treatment of the illness.Although most people do...
LED Wickets

How do LED Wickets in Cricket works?

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If you are watching cricket then you might have noticed flashing LED Wickets system. The bails and stumps LED lights flash when the ball...