Simulink L298N DC Motor Driver Enable PIN Question

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Christos Tsallis 2021-12-20

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https://ww2.mathworks.cn/matlabcentral/answers/1614905-simulink-l298n-dc-motor-driver-enable-pin-question

评论： Christos Tsallis 2021-12-21

Hello,

I am trying to change the speed of a small dc motor using the module L298N and Arduino UNO. I am using the enable pin (Which is the pwm pin of L298N) in order to change the speed of the dc motor. The value of that pin must vary from 0 to 255 and the problem is that the constant value is from 0 to 1. When I set the constant >=0.5 motor starts at full speed and when I set it <0.5 motor stops. This means that it can understand only 2 states (on and off), is there any way to make it control its speed?

Thanks for your time, appreciate your help.

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DGM 2021-12-21

The L298N does not do its own PWM. The enable pin only supports two states. In order to modulate the driver current, you need to actually apply a PWM signal.

https://www.mathworks.com/help/supportpkg/arduino/ref/pwm.html