Headphone amplifier

Headphone amplifier:

This is a Headphone amplifier circuit diagram. sometimes we need an amplifier for our headphones because of the low sound volume. some tv has no headphone output line. there have only one audio pre-out for another amplifier. there we need this circuit diagram. this circuit runs with 5 volts only. here used 2 transistors. bc547. this is an NPN transistor. Collector, Base, and Emittor. 

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