直流小电机的调速

上传者: lixiufei1028 | 上传时间: 2022-12-06 17:31:10 | 文件大小: 24.03MB | 文件类型: ZIP
拨动开关S21~S28输入8位数字量(00-0FFH)来控制89C51的P3.0输出方波的占空比(数字量0对应占空比为0%,数字量0FFH对应占空比100%),将此方波信号通过功放电路驱动直流小电机。改变数字量的大小来调整直流小电机转速的快与慢

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