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一看就懂|什么是PWM-脉冲宽度调制？
脉冲宽度调制(PWM)，是英文“Pulse Width Modulation”的缩写，简称脉宽调制，是利用微处理器的数字输出来对模拟电路进行控制的一种非常有效的技术，广泛应用在从测量、通信到功率控制与变换的许多领域中。生活中许许多多的灯光变换，变速等都是通过PWM控制的，那就一起来看看是什么是PWM吧！
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