Introduction: USB Stereo Amplifier 20W+20W With TDA2822M

0.1uF 50V/63V ceramic cap. x2
470uF 25V electrolytic cap. x1
1uF 50V electrolytic cap. x2
100 ohm resistors x2
10k ohm dual or 100k ohm dual pot. x1
TDA2822M 8DIP x1
3W, 5W, 10W, 15W and 20W speakers

You can use 3.7V for a portable speaker or power the amp using USB

You can use the following voltages 3.7V / from USB / 12V and !!! MAX 15V/1A !!!