Arduino UNO based Temperature, PWM generator, Frequency and RPM meter.

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所以在Arduino IDE中对IO进行控制时，一定要认准实际的index。 表格中还对应了PWM，RP2040最多支持8个PWM通道，每个通道有2个输出引脚，所以这30个引脚，同一时间只能输出16种不同占空比的PWM波，且所有输出只能对应一种周期：2ms。

在这里，Arduino 用于生成 PWM 脉冲，该脉冲从电位器获取输入，并将 PWM 信号输出到 TRIAC 和光耦合器电路，进一步以所需的速度驱动交流风扇。 电路原理图 这个基于 Arduino 的 230v 风扇速度控制电路的电路图如下所示： ...

If you've got an Arduino of any variety, you might have noticed some of the pins on the board have a tilde mark or PWM printed next to them. What is PWM?

The purpose of this project is to provide a 4-20 mA output from a PWM signal generated by a microcontroller. One of the more interesting applications of this circuit would be to replace or to realize ...

Deciding between PWM and DC case fans can be confusing. At the same time, it is important for the optimal performance of your computer.