Today I am going to make a Transistor Amplifier using BD139 Transistor.This transistor amplifier is working properly.It's output sound depend upon the speaker and source.
Let's get started,
Step 1: Take All Components As Shown in the List/pictures
Components Required -
1.Battery - 9V
2.Battery connector wire
4.Transistor - BD139
5.Resistor - 1K
6.Capacitor - 16V 100uf
Step 2: Connect All Components As Shown in the Circuit Diagram
All components are compulsory for this amplifier.
Step 3: Connect Resistor
Connect 1K resistor to the Collector and Base of the transistor as shown in the picture.
Step 4: Connect Capacitor
Now Connect the +ve of 16V 100uf Capacitor to the base of the transistor as you can see in the picture.
Step 5: Connect AUX Cable
Solder +ve of aux cable to the -ve of capacitor.
and solder the -ve of aux cable to the emmiter of the transistor.
Step 6: Solder Speaker Wire
Now solder the +ve wire of speaker to the emmiter of the transistor.
Step 7: Connect Battery Wire
Next Solder the -ve wire of battery to the -ve wire of speaker.
and the +ve wire of Battery to the collector of the transistor.
Step 8: Connect Battery
Connect battery to the circuit.
Now our BD139 transistor amplifier is ready to play.
Connect aux cable to your phone/laptop/tab/......etc and play songs and enjoy
Step 9: Enjoy With Full Volume
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