Easy robot: light follower

Step 4: Operate it

Picture of Operate it
When I just finished the robot i didn't quite know what to do with it, yes i knew it drives towards light but then what do the variable resistors do?

Turns out that the resistors say how sensitive a light dependent resistor is.
if you turn the one close to the left LDR then the left LDR will become less sensitive. and thus the RIGHT motor will not turn as fast.

PS: you can get this kit at:
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