Saturday, October 3, 2009

20W Audio Amplifier circuit with TDA2005

Here the 20W audio amplifier circuit which use power IC TDA2005 as the main component. The output typical is bridge output. It's mean that the speaker line is not connected tho the grounded line.
20W  Audio Amplifier circuit with TDA2005

Download this file for complete explanation about 20W Audio Amplifier circuit with TDA2005 include the schematic diagram and component list.

About Audio Amplifier
An audio amplifier is an electronic amplifier that amplifies low-power audio signals (signals composed primarily of frequencies between 20 - 20 000 Hz, the human range of hearing) to a level suitable for driving loudspeakers and is the final stage in a typical audio playback chain.

The preceding stages in such a chain are low power audio amplifiers which perform tasks like pre-amplification, equalization, tone control, mixing/effects, or audio sources like record players, CD players, and cassette players. Most audio amplifiers require these low-level inputs to adhere to line levels.

While the input signal to an audio amplifier may measure only a few hundred microwatts, its output may be tens, hundreds, or thousands of watts. More explanation about power audio amplifier can be found at

This is a video tutorial about how to a very simple audio amplifier based on the LM386 amplifier chip. It can be built for less than $20 (or might be less than $8 in some countries) and used to amplify any low level audio signal including a guitar, bass or mp3 player.

Watch the video:

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