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简易卡拉OK机的制作 1995年第8期向读者介绍了简易高保真功率放大器的制作。本期将在原来制作的基础上,附加部分电路,使其具有混音功能可接两只话筒和一台影碟机或录象机、CD机、录音座等音频信号源,由音频信号源播放伴奏音乐,供两人同时进行卡拉OK演唱,也可作为单位小型会议室作语言扩音用。这样就使整台设备提高了一个挡次。增加的部分电路由2只TL082集成双运放组成,见图1的左半部分(图中只画出L通道,R通道与L相同)。每一
Simple karaoke OK machine production in 1995 No. 8 to the reader introduced the production of simple high-fidelity power amplifier. This issue will be based on the original production, the additional part of the circuit, it has a mixing function can be accessed by two microphones and a DVD player or video recorder, CD player, audio recording and other audio sources, played by the audio signal source Accompaniment music for two people at the same time karaoke concert, but also can be used as a unit of small conference room for speech amplification. In this way, the entire equipment is raised a block. The added part of the circuit consists of two TL082 integrated dual op amps, see the left part of Figure 1 (only draw the L channel, R channel and L the same). Each one