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….
Step 1: Components
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
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
This is the circuit which we are going to make.
Step 3: Placing the IC
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
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
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
Step 7: 10 ohm resistor & 0.047 capacitor
Step 8: Volume Controller
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.
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.