DIY Mini PC Speaker TDA2822M USB Stereo Amplifier

The TDA2822M  IC used in this project is a dual amplifier built  into an  eight pin chip.  It consists of two channels, each identical and with external  components  to  provide  a  very  simple  but  powerful  stereo amplifier,  with  a  gain  of  39dB and a current draw of 9mA with supply voltage in the range of 1.8 – 15 Volts you can do USB for powered amplifier DIY mini PC speaker.

It  will plug into the earphone socket of Walkman type machines and give excellent quality stereo sound from  two  speakers.  Students  are encouraged  to  research  the  fascinating  technology  of  speaker box design.

Test  your  amplifier  by  plugging  into the earphone socket of your radio or player, turn the volume down, and switch on.  Adjust balance with the trimpots.  Mostly you will find that the Amp will work first time.