![]() Now depending upon the values of the Input and Enable the motors will rotate in either clockwise or anticlockwise direction with full speed (when Enable is HIGH) or with less speed (when Enable is provided with PWM).Let us assume for Left Motor when Enable is HIGH and Input 1 and Input 2 are HIGH and LOW respectively then the motor will move in clockwise direction. A second motor would be attached between OUT3 and OUT4. We are just using half the chip in this lesson, most of the pins on the right hand side of the chip are for controlling a second motor. It can actually control two motors independently. Thus, we use four capacitors that help to dampen the extreme variation in current. DC Motor Reversing L293D Save Subscribe This is a very useful chip. At this point the fluctuation in voltage is quite high and this can damage the IC. There can be fluctuations of voltage while using the motor say when suddenly we take a reverse while the motor was moving in some direction. So, it develops a back EMF when supplied by a voltage. If you want to control 4, you would need two of them. If you are truly using an L293D, then I would suggest you look at an example of how you control 2 DC motors with one L293D. I am using 4x1.5V AA batteries as a power source. When we solder the pins on PCB, we get a huge metalllic area between the grounds where the heat can be released. Hello, I have connected 4 DC gear motors to L293D and mounted them to an Arduino Uno. So, we need a heat sink to reduce the heating. Due to so much current flow the IC gets heated. The motor driver IC deals with heavy currents. 9 - Enable 3-4, when this is HIGH the right part of the IC will work and when it is low the right part won’t work. ![]()
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