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市场上出售的电脑有源音箱体积庞大、功能单一,价格都在百元以上。电脑上用的有源音箱对音质没有过高的要求,一般用于学习多媒体教育光盘、欣赏CD、发出系统提示音等用途。笔者最近自制了一个廉价的电脑有源音箱,不但能满足上述功能,而且能内置在机箱内部,通过一个音量开关就能控制音箱电源的开、关和音量大小。 工作原理:TDA2002是音频功率放大集成 电路(图1),能在8欧姆负载上输
On the market for sale of computer active speakers bulky, single function, the price is more than one hundred yuan. Active speakers on the computer on the sound quality is not too high, generally used to learn multimedia education CD, enjoy the CD, issued a system tone and other purposes. Recently I made a cheap computer active speakers, not only to meet the above functions, but also built-in chassis, through a volume switch can control the speaker power on, off and volume. How it works: TDA2002 is an audio power amplifier integrated circuit (Figure 1), capable of transmitting on an 8 ohm load