circuit diagram of high power audio amplifier

Circuit Diagram Of High Power Audio Amplifier

In this tutorial “Circuit Diagram Of High Power Audio Amplifier” you will how to make an audio amplifier which you can utilize with any of your musical instruments like piano, gitar and with ipod and other devices? So, Lets begin the journey….
circuit diagram of high power audio amplifier

Step 1: Components

circuit diagram of high power audio amplifier
circuit diagram of high power audio amplifier2

Following components are required

1- LM 386 semiconductor (IC)
2- 100 micro Farad capacitor
3- 220 micro Farad capacitor
4- 10 ohm resistor
5- 5 kilo ohm variable resistor
6- 100 ohm variable resistor
7- 0.01 capacitor
8- 0.047 capacitor
9- Wires
10- 9V Battery clip
11- 9V Battery
12- 3.5mm stereo jack male
13- 3.5mm stereo jack female
14- Project board ( you can also use dotted board and solder)

You can find these electrical components from your any nearest electronics store.These all components are easy to find and also common so you won`t have a hard time to find it.

Step 2: Circuit Diagram

circuit diagram of high power audio amplifier

circuit diagram of high power audio amplifier
circuit diagram of high power audio amplifier

This is the circuit which we are going to make.

Step 3: Placing the IC

circuit diagram of high power audio amplifier

1- Place the LM 386 in the project board as show in the image.

2-If you are going to pick the IC in front of you (so you can read what is written on it) then the lower left pin is 1 and the pin number increases anti-clockwise. Take a wire and join the 3rd pin to 4th pin(GND pin).

Step 4: 0.0.1 Capacitor

circuit diagram of high power audio amplifier
circuit diagram of high power audio amplifier

Join the one pin of 0.01 capacitor with the 2nd pin of IC. The other pin of the capacitor must be joined with the INPUT.

Step 5: GAIN Controller

circuit diagram of high power audio amplifier

circuit diagram of high power audio amplifier
circuit diagram of high power audio amplifier

4-Now join the 1st pin of IC with the A pin of the 5 k ohm variable resistor.
Join th A pin of this variable resistor with the C pin. Eventually,  join the 8th pin of IC with the B of this variable resistor. This becomes the GAIN.

Step 6: 100 micro Farad Capacitor

circuit diagram of high power audio amplifier
circuit diagram of high power audio amplifier
5-Join the +ve side of the 100 micro Farad capacitor with 6th pin of the IC.The -ve of this capacitor should be joined with GND pin (4th pin of IC).

Step 7: 10 ohm resistor & 0.047 capacitor

circuit diagram of high power audio amplifier
circuit diagram of high power audio amplifier
6-Join the 5th pin of IC with one side of 10 ohm resistor, the other side of the resistor has to be joined with the one pin of 0.047 capacitor. The second pin of the capacitor needs to be joined with the GND pin (4th pin of IC).

Step 8: Volume Controller

circuit diagram of high power audio amplifier

circuit diagram of high power audio amplifier
circuit diagram of high power audio amplifier
7-Now again join the 5th pin of the IC with the +ve side of 220 micro farad, the -ve side of the pin should be attached with the A of the 100 ohm variable resistor.The B pin of the variable resistor should be connected to the GND pin (4th pin of IC).This will become the volume controller.

Step 9: Input and Outputcircuit diagram of high power audio amplifier

circuit diagram of high power audio amplifier
circuit diagram of high power audio amplifier

8-Join the +ve pin of the 3.5mm stereo jack (female) with the C of the 100 ohm variable resistor.And the GND of the (female) jack should be attached with the GND of the IC (4th pin of IC).

9-Join the +ve of the 3.5 mm stereo jack male with the other side of the 0.01 capacitor and join the GND of the jack (male) with the GND of the IC.

Read>> Electrical Appliances Over Under Volt Protection Circuit Diagram

Step 10: Testing

10- Last but not the least join the +Ve of 9V battery with the 6th pin of IC and -Ve of the battery with the 4th pin of IC.

Congrats! you’ve built your own simple audio amplifier.

Now the time to test it out. Join the male jack with your mp3 player or musical instrument and female with speakers. Now you have to adjust the Volume and Gain to get the best and loudest possible sound. I should notify you that with this amplifier only one speaker is gonna work. And do the adjustment from low to high.Do the adjustment carefully otherwise it can damage your speakers.

You can change the input jacks according to  your requirement. You can add a 220 micro farad variable capacitor instead of simple 220 micro farad capacitor to change the bass.

 

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