Stereo/Surround Sound Amplifier
Approx construction cost US$24
An inexpensive, easy-to-build, stereo amplifier that can also produce pseudo surround sound when used with an existing stereo amplifier.
This Stereo/Surround Sound Amplifier is a simple system based on a TDA2822M amplifier i.c. and is rated at 1 watt per channel. At first sight this may appear puny, but note that this is a genuine watt, in other words it is an r.m.s. measurement. When driven from a 12V supply there will be plenty of sound.
If you already have a stereo amplifier, then this 1W amplifier project may be used to extract a pseudo surround sound signal, and the p.c.b. includes provision for additional resistors and a capacitor i.e. the Surround Sound Extractor. The cost of the surround sound components is less than 0.5 UK pounds (80 US cents), and should not be confused with Dolby Surround, Dolby Pro-Logic, Dolby Digital, or DTS sound! But the effect – considering the modest cost – is quite convincing.
More details on this construction project can be found in the July 2001 issue of EPE Online, the world's first web-delivered electronics and computing hobbyist magazine.
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