line follower dc motors problem

pratik20990
pratik20990
@pratik20990-Y0V1iW • Oct 26, 2024

Hi, I have made a line follower bot circuit consisting of AT89S52 MCU, 2 IR sensors with lm324 op-amp and l293d motor driver IC. My motor specifications are 24V,200rpm.
When I run the complete circuit, it works fine but after some time the motors stop running and I have to press the reset button(connected with reset circuit of mcu) to again restart the motors, but the running time of motors gets shortened after every reset.
I just cant understand the reason behind this.😕😕😔 Is back emf the cause for this?😒
Please anyone help me out....

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  • silverscorpion
    silverscorpion

    @silverscorpion-iJKtdQ • Feb 7, 2010

    How much voltage are you giving the motors? And how much to the sensors?

    You might want to check if the sensors are working properly after the motors stopped running.
    Also, for a 24V motor, if you give say, 12 V, it'll be drained very soon. Motors are very power hungry!!

    Look into the battery current and voltage ratings...

    0
  • pratik20990
    pratik20990

    @pratik20990-Y0V1iW • Feb 7, 2010

    silverscorpionHow much voltage are you giving the motors? And how much to the sensors?

    You might want to check if the sensors are working properly after the motors stopped running.
    Also, for a 24V motor, if you give say, 12 V, it'll be drained very soon. Motors are very power hungry!!

    Look into the battery current and voltage ratings...

    Yes sensors are working fine after the motors have been stopped.
    I am giving 12V to motors and sensors and rest of the circuit is working on 5V.
    What can be the reason for this kind of behaviour of DC Motors?

    0