making a cut-off delay timer circuit with a transistor bc547

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Transistor Delay Timer | Diy Transistor Delay OFF Timer Circuit | Using BC547 NPN Transistor

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Relay oFF time delay timer by using bc547 and capacitor ||#relay timer

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TOP 25 Electronic Projects For Beginners Using Transistor BC547

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Capacitor Based Delay Circuit

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Relay OFF Time delay timer by using NPN Transistor and Capacitor

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Short Longer Delay full turn off Circuit using NE555 BC547 and BC557...How to make delay cut off..

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Time Delay Relay Circuit Using BC547 Trainsistor // Delay Off Timer Circuit // Simple Timer Circuit

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How to make a Delay timer | How to make a latch circuit using BC547

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Time Delay Relay circuit using 555 timer IC | Off delay timer Switch | UTSOURCE

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