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en:sw:01-mervis:advanced-modes-of-digital-outputs-hidden [2020/05/11 13:54] avsetula [Setting the PWM in Mervis] |
en:sw:01-mervis:advanced-modes-of-digital-outputs-hidden [2021/04/29 13:15] avsetula |
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| ====== Advanced mode of digital outputs: PWM ====== | ====== Advanced mode of digital outputs: PWM ====== | ||
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| The PWM stands for Pulse-Width Modulation. It is for generating a square signal of given frequency and certain duty cycle on a digital output. Typically, it is used for regulating a DC powered component in a way the analog regulation cannot achieve. | The PWM stands for Pulse-Width Modulation. It is for generating a square signal of given frequency and certain duty cycle on a digital output. Typically, it is used for regulating a DC powered component in a way the analog regulation cannot achieve. | ||
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| Let's take a 24V DC motor for example. To achieve 100% RPMs, you have to supply it with 24V. Logically, to achieve 10% RPMs, you have to supply it 24V/10 = 2.4V. But if you apply this voltage, the motor will not even start, because of the friction and its load. And if it starts, its torque will be very low. This is one of the downsides of analogue regulation. | Let's take a 24V DC motor for example. To achieve 100% RPMs, you have to supply it with 24V. Logically, to achieve 10% RPMs, you have to supply it 24V/10 = 2.4V. But if you apply this voltage, the motor will not even start, because of the friction and its load. And if it starts, its torque will be very low. This is one of the downsides of analogue regulation. | ||
