Today I am going to make an audio amplifier using LA4440 IC.This amplifier circuit is very simple and we require only one component.
Let's get started,
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Step 1: Take All Materials As Shown Below -
Materials required -
(1.) IC - LA4440 x1
(2.) aux cable x1
(3.) Speaker - 20W x1
(4.) Adapter - 12V
(5.) Jumper wire
(6.) Capacitor - 25V 100uf x1
Step 2: LA4440 IC
This is an amplifier IC.This IC contain 14 pins.
We can count its pins from front side as shown in the picture.
Step 3: Connect Capacitor
Firstly we have to connect a capacitor.
Solder +ve pin of capacitor to the pin-1 of IC as solder in the picture.
Step 4: Next Connect Jumper Wire
Next we have to connect jumper wire.
Solder jumper wire to pin-2, pin-3, pin-8 and pin-14 of the IC as solder in the picture.
GND pin - pin-2, pin-3, pin-8 and pin-14.
Step 5: Connect Aux Cable Wire
Now connect aux cable wire to the circuit.
Connect Left/Right wire of aux cable to the -ve pin of capacitor and
Connect -ve wire of aux cable to the GND wire of IC which is pin-2, pin-3, pin-8 and pin-14 as you can see in the picture.
Step 6: Connect Speaker
Now we have to connect speaker wire to the circuit,
Solder +ve wire of speaker to pin-10 and
-ve wire of speker to pin-12 of IC.
Step 7: Now Connect Power Supply Wire
Now we have to connect power supply wire to the circuit.
NOTE : Give 12V 1-3A DC power supply to the circuit.
# Connect +ve wire of power supply to pin-11 of IC and
# -ve wire of power supply to GND wire as solder in the picture.
HOW TO USE IT -
Give power supply to the circuit and plug aux cable to mobile phone/laptop/tab......
Enjoy the music
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