LINE FOLLOWER ROBOT BY dhazarika456

[query]

 

Suppose i want to make a line follower robot. Then, how can we say that

that much amount of resistance is required(i.e 20,50,150 ohm for particular

circuit). Can’t it be user defined. Or it depends on relation V=IR (i.e if a motor

has a range of 5v,then we have to set the resistance to give output 5v).

 

[GANEEV SINGH]

Hi there

Motors generally do not need resistors to run unless you want to limit the current passing through them. Also for the kind of application you have specified above L293D seems to be the best option. If you want something which can adjust motor's speed then you should look forward to PWM concepts rather than this resistor thing.

I am sharing two useful links, hope these will help you:

1. "engineersgarage.com/contribution/dc-motor-speed-control-using-pwm-modulation"

2. "engineersgarage.com/contribution/line-follower-robot-using-8051-microcontroller"

[Ashutosh Bhatt]

i think u r confused. in LFR, resistance is just used in IR sensor for setting sensitivity

[Author]

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