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本文介绍一款简单易装的磁带放音机。此机电路用二片IC,外围元件少,一装即成,非常适合初学电子制作者练习安装。该机电原理如图所示。LA4160是日本三洋公司设计制造的磁带放音集成电路,内含磁带(话筒)前置放大电路、功放电路和自动电平控制电路供录音时使用(本机不用)。该IC工作电压6～9伏,当使用9伏电源时,可输出2瓦的放音功率。使用6伏电源时,亦有1瓦的放音功率。由于有二级去耦电路,故其声音宏亮,噪声很小。该IC外围电路简单,成本低。
This article describes a simple and easy to play tape player. This machine circuit with two IC, fewer external components, an installed Serve, very suitable for beginner electronic producers practice installation. The electromechanical principle as shown. LA4160 is designed by Japan’s Sanyo tape playback integrated circuits, tape (microphone) preamplifier circuit, amplifier circuit and automatic level control circuit for recording (not the machine). The IC operating voltage 6 ~ 9 volts, when using a 9 volt power supply, you can output 2 watts of playback power. When using a 6-volt power supply, there is also 1 watt of playback power. Because there are two decoupling circuit, so the sound loud and clear, the noise is very small. The IC peripheral circuit is simple and low cost.