In this instructables,I will show you how to make 2 watt audio amplifier.It can give a output of 2 watt. The heart of this circuit is the IC TDA7052. It is a IC with 8 pins. This circuit can be operated with only 6 Volt.This is the easiest mono amp which uses less parts.I hope you would like it.

Step 1: Things You Will Need

The things you will need are:
1. 1 TDA7052 IC: You’ll find this IC online and
electronic stores. About this IC.

2.2 capacitors of 220µF of any volt, 100nF ceramic

capacitor (you don’t need the capacitors if you’re using batteries).

3.A 4.7 k volume control (potentiometer) and,.

4.1 inch x 1 inch Vero board: You can use Perf board,

too.

5. Some Wires.

6. Batteries.

7. 3.5 mm headphone jack.

Step 2: Making the Circuit

Here is the circuit of the amplifier.I made it on a Vero board and soldered it.If you don’t know how to solder then visit this page.I used the 8 pin base(socket) for safety of my IC. In the picture you see I cut the connection between the IC’s pins. In the picture I didn’t use the capacitor because I used batteries, but if you want to adapter then use the capacitors. I taped those wires in the picture with the Vero board for easiness. This circuit will give an output of 1 to 2 watt.If you try this circuit on a breadboard (Project board) maybe it won’t work well. But if you solder it on Vero board or perfboard it will work great.

Step 3: Tasting the Circuit

Connect the jack to your iPod, mp3 or mobile phone and play audio. I hope it will work great.

Step 4: Making the Box

To know how to make the box,Please,visit this page

Step 5: DONE!!!!

Congratulation! You have just maked a 2 watt audio
amplifier.

Have fun

1 Person Made This Project!

JindřichV made it!

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20 Comments

JindřichV

11 months ago

I must say I am astonished how everyone copies the same design flaw over and over and no one seems to be brave enough to admit the error.
This circuit does not work, as I myself proved so many time by personal experience. You can try yourself that as you turn the potentiometer, sound gets distorted or disappears completely, while the IC is notably heating, producing no output.
The reason is that there must be ZERO DC CURRENT at the input. If this condition is not fulfilled, the two outputs go out of balance and DC current starts flowing through the speaker, which can be noted by watching its membrane. As you turn on the amplifier, the membrane raises (or deepens) significantly, then it returns about half way. The latter effect is caused by the thermal protection circuit. In the beginning the imbalance causes significant DC current to flow through the speaker and as a consequence the IC starts heating. After reaching the critical temperature, current is reduced by the protection circuit and keeps it at the reduced level.
It is a great mistake to use the NXP datasheet, copied all over the internet (including the NXP site itself) which is missing important details. Instead use UTC datasheet, which is correct (showing no DC connection to pin 2 and correctly showing coupling capacitor 0.47 uF between signal input and pin 2).