BC547 Double Transistor Audio Amplifier

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Hii friend,

Today I am going to make an amplifier using Double transistor of BC547.

Let's get started,

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Step 1: Take All Parts As Shown Below

Components required -

(1.) Transistor - BC547 x2

(2.) Resistor - 10K x1

(3.) Aux cable x1

(4.) Power supply - 5V DC

(5.) Capacitor - 63V 1uf/2.2uf x1

(6.) Speaker x1

Step 2: Connect Both Transistors

Firstly we have to connect both transistors.

Solder emmiter pin of transistor-1 to base pin of transistor-2 as solder in the picture.

Step 3: Connect 10K Resistor

Next we have to connect 10K resistor to the circuit.

Solder 10K resistor between collector and base pin of transistor-1 as you can see in the picture.

Step 4: Connect Capacitor

Next solder +ve pin of 2.2uf capacitor to base pin of the transistor-1 as you can see in the picture.

Step 5: Connect Speaker Wire

Connect speaker wire to the circuit.

Solder +ve wire of speaker to collector pin of transistor-1 and

solder -ve wire of speaker to collector pin of transistor-2 as you can see in the picture.

Step 6: Connect Aux Cable

Next solder +ve (Left/Right) wire of aux cable to -ve pin of capacitor and

solder -ve wire of aux cable to emmiter pin of transistor-2 as solder in the picture.

Step 7: Connect Power Supply Wire

Next connect 5V DC Power supply wire to the circuit.

NOTE : We can give input power supply with 5V charger,5V battery,.....5VDC.

Connect +ve clip of power supply to collector pin of transistor-1 and

-ve clip to emmiter pin of transistor-2 as you can see in the picture.

Step 8: Aplifier Is Ready

Now Plug-in aux cable to mobile phone/laptop/tab.....and play songs.

Thank you

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    ErwinM5

    Question 2 months ago

    Fantasties project, and simple
    I would like to try the circuit to control a servo with my android phone via sound would this be possible
    Can you help me please