Convert Old Mobile Charger to Audio Amplifier

Hii friend,

Today I am going to an audio amplifier using mobile charger.We can also use wastage of charger.We will need only transistor of mobile charger and also we can use 1K resistor of the charger which is connected to the LED indicator.

Let's get started,

Step 1: Take All Materials As Shown Below

Materials required -

(1.) Transistor - C9014 (from old mobile charger) x1

(2.) Capacitor - 25V 100uf/16V 100uf x1

(3.) Resistor - 1K x1

(4.) Speaker x1

(5.) Battery - 9V x1

(6.) Battery clipper x1

(7.) aux cable x1

Step 2: C9014 Transistor

This picture shows the pin outs of transistor C9014.

Step 3: Connect All Components

Firstly we have to connect all components according to the circuit diagram as shown in the picture.

Step 4: Connect 1K Resistor

Connect 1K resistor to the transistor.

Solder 1K resistor to collector and base pin of transistor C9014 as you can see in the picture.

Step 5: Connect Capacitor

Next we have to connect a capacitor to the circuit.

Solder +ve pin of capacitor to the base pin transistor as shown in the picture.

Step 6: Connect Aux Cable Wire

Next we have to connect aux cable wire to the circuit.

Solder +ve wire of aux cable to the -ve pin of capacitor and

solder -ve wire of aux cable to the emmiter of transistor as you can see in the picture.

Step 7: Connect Battery Clipper Wire

Next we have to connect battery clipper wire to give power supply to the circuit.

Solder +ve wire of battery clipper to collector of transistor as shown in the picture.

Step 8: Connect Speaker Wire

Now connect speaker wire.

Solder +ve wire of speaker to emmiter pin of transistor and

solder -ve wire of speaker to -ve wire of battery clipper as you can see in the picture.

Step 9: HOW TO USE IT

Connect battery to the battery clipper and plug in aux cable to mobile phone and play songs.

NOTE : We can give 5-9V DC input power supply to this circuit.

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Thank you