From the Light Seeking Car circuit: 1- a: What is the significance of the compar

Question

From the Light Seeking Car circuit:
1- a: What is the significance of the comparator chip in the light seeking car circuit ? Please give a short and specify answer. b: Could this circuit be implemented properly without the comparator use? why? From the Light Seeking Car circuit:
1- a: What is the significance of the comparator chip in the light seeking car circuit ? Please give a short and specify answer. b: Could this circuit be implemented properly without the comparator use? why? From the Light Seeking Car circuit:
1- a: What is the significance of the comparator chip in the light seeking car circuit ? Please give a short and specify answer. b: Could this circuit be implemented properly without the comparator use? why?

Explanation / Answer

Solution:(a)

a comparator compares output voltages from photo diodes to the reference voltage. When light falls on the photo

diode of one side it gives output voltage which is compared with reference voltage. if voltage if greater than

reference voltage . The comparator produces output (1) and hence that side motor rotates and wheel moves .

when there is no light output of comparator is zero.

(b)

the circuit can be implemented without comparator by using microcontroller and analog light sensor.

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