Introduction: USB Portable Speaker With Amplifier

This is a very simple USB amplifier with just three components and a speaker, it can be used as a mono headphone amplifier too, the input powersupply is 5v obtained from the used this system can b used for listening songs while travelling and this circuit can work from powerbanks too. the component costs are so less too.

Step 1: Parts List

1 x common circuit board ( dot matrix board)

1 x 3.5 mm headphone socket

1 x 100uf electrolytic capacitor

1 x BC547 transistor

1 x 1K ohm resistor

Step 2: Circuit Diagram

complete the circuit according to the circuit diagram

Step 3: Conclusion

enjoy music all the way :), cheap and effective and can be made easily with very less components