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.

If you want to make more electronic projects like this then follow utsource now.

Thank you

Comments

[mrspecial684]

How many watts is the output to the speaker on this project?

[ThomasR251]

I took a charger apart, and there isn't any transistors on that board.
I guess I have to cannibalize another one.

[smithjulian143]

Hello, my name is Julian. I am almost finished with this project. I would like to thank you for sharing it. But I am curious as to any information about the speaker you can share? Thanks again and God Bless.

[Felix Pz]

I can't be useful here but from the images in the tutorial, it seems that the author is using a quite powerful (though small) speaker. I would use any similar one at hand just as a first approach.
NOTE: I haven't so far tried this project.

[HelpfullDoggo]

I made it but i had
to use a 4 pin photo transistor but
it sounds very low and i hear noise.
i also used 5 volts , pls help me.

[Felix Pz]

I'm not sure but as far as I know, if you use a phototransistor, you need to shed light on it to work. On the other hand, I don't know how a phototransistor can help here. You better look for equivalent transistors of S9014 (look at my comment up there).
Another idea to remedy that it sounds low is to power it with >5 volts, trying with different values up to 9 volts.

NOTE: I haven't so far tried this project.

[dvansh9185]

May I use a different transistor. Please answer

[Felix Pz]

From internet:

"BC547C, NTE2672, BC337−40, BC635, MPSA18, 2N5962, MPS6571, 2N2222,
S8050, 2N4401, BC537, SS9013, (These are the nearest possible equivalent
or replacement transistors for SS9014. The pin configuration of these
transistors may be different from SS9014 therefore it is suggested to
check pin configuration of the transistor you are using in your
circuit.)"

NOTE: I haven't so far tried this project.