Hello damn dog. See here from Optronics.com. In this Arduino tutorial, we will learn how to control DC motors using Arduino. We will take a look at some basic techniques for controlling DC motors and make two examples through which we will learn how to control DC motors using the L298N driver and the Arduino board. At the end, we will be able to build and control our own Arduino robot car. We can control the speed of a DC motor by simply controlling the input voltage to the motor. The most common method of doing that is by using a PWM signal. PWM, or pulse width modulation, is a technique which allows us to adjust the average value of the voltage that is going to the electric device by turning on and off the power at a fast rate. The average voltage depends on the duty cycle, or the amount of time the signal is on versus the amount of time the signal is off in a single period of time. So, depending on the size of the motor, we can simply connect an Arduino PWM output to the base of a transistor or a gate of a MOSFET and control the speed of the motor by controlling the PWM output. The low-power Arduino PWM signal switches on and off the gate at the MOSFET through which the high-power motor is driven. On the other hand, for controlling the rotation direction, we just need to invert the direction of the current flow through the motor. The most common method of doing that is by using an H-bridge. An H-bridge circuit contains four switching elements, transistors or MOSFETs, with the motor at the center forming an H-like configuration. By activating two particular switches at the same time, we can change the direction of...
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