In this instructable you'll learn, how to make a simple audio amplifier with the TDA2822M. The total cost of the components shouldn't cost much (5$ max) and because the circuit is very simple you don't need a PCB, you can make it on a protoboard.
Step 1: Things you'll need
You'll need a soldering iron, cutters and solder.
From the components you'll need:
Step 2: Assembly
Start by putting a resistors into the board. When you put them in, bend legs for a little, so they'll stay in. Than solder it .Than put the IC in and solder it. That put the capacitors in and solder than. And finally solder the bornier connectors in.
Step 3: Finish
Congrats now you have your mini amplifier. On the left you have power input. I recommend using 3-4V so there won't be much heat dissipation. In the middle there is a speaker output and on the right there is input.