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Reverse Polarity Protection using Relay

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04:59

Dual Flasher Circuit Using 555 Timer

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03:15

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03:50

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03:55

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12V Battery Charge Indicator

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3.7V Battery Charge Indicator

09:32

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Dark Sensor using TIP41C

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How to make a Microphone using Pam 8403 Module

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5V to 1.5V Converter for Wall Clock

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