Science, asked by shreyagargnagod, 8 months ago

why 2npn transistors are used in automatic street lighting system circuit?

Answers

Answered by Itzpurplecandy

Answer:

It is a simple and powerful concept, which uses transistor (BC 547 NPN) as a switch to switch ON and OFF the street light system automatically.It automatically switches ON lights when the sunlight goes below the visible region of our eyes. (e.g in evening after Sunset

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