Today I am going to make a circuit of an Audio Amplifier using D882 Double transistor.
Let's get started,
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Step 1: Take All Components As Shown Below
Step 2: Transistor - D882
This is the pins of this transistor.
Step 3: Connect Both Transistors
Firstly we have to connect both transistors to each other.
Solder Base Pin of Transistor-1 to Emmiter pin of Transistor-2 as solder in the picture.
Step 4: Connect 120K Resistor
Next we have to connect 120K resistor to the transistor.
Solder 120K resistor between Collector pin of Transistor-1 to Base Pin of Transistor-2 as you can see in the picture.
Step 5: Connect 4.7uf Capacitor
Next we have to connect 50V 4.7uf Capacitor to the circuit.
Solder -ve pin of capacitor to Base pin of Transistor-2 as solder in the picture.
Step 6: Connect Speaker Wire
Solder +ve wire of speaker to Collector pin of Transistor-2 and
Solder -ve wire of speaker to collector pin of Transistor-1 as you can see in the picture.
Step 7: Connect Battery Clipper Wire
Next Solder +ve wire of battery clipper to Collector pin of Transistor-2 and
Solder -ve wire of battery clipper to emmiter pin of transistor-1 as solder in the picture.
Step 8: Connect Aux Cable Wire
Now We have to connect wires of the aux cable.
Solder +ve (Left/Right) Wire of aux cable to +ve pin of capacitor and
Solder GND wire of aux cable to emmiter pin of transistor-1 as you can see in the picture.
Step 9: Last Step
Now audio amplifier circuit is completed so connect battery to the battery clipper and pug-in aux cable to mobile phones and play songs.
This amplifier is working awesome.