Hello LMRians, This is a PID implemented line follower using an Arduino ATmega168 clone, Pololu QTR-8RC sensor array, a Pololu TB6612FNG Motor Driver, and super fast and zippy pololu micrometal gear motors. ( 30:1 Gear Ratio, MP version) PID? Is that the name of a super hero or…

#define motorPower 8this is #define motorPower 8 this is the STBY pin from driver?

correct! you need to set it correct! you need to set it to HIGH for the motors to turn.

thanks Verde. But maybe you thanks Verde. But maybe you could try posting the whole photo in the comment instead of just the link? Cheers!

Where to get parts Dai, where did you get those parts and components in Nepal…

I don’t think you’ll get the I don’t think you’ll get the exact same components here in Nepal. Apart from the microcontroller, I ordered the rest from Pololu (an international robot store). You might want to do a quick google search.

Its costing alot with so Its costing alot with so much of shipping charges at pololu website. Just wanna know how much did it cost you for all the required components?? And how did you ordered those?? Did you pay with credit card at their website or used services as harilo.com

Well, the total cost was the Well, the total cost was the item price + shipping + tax. (that’s obvious!) I ordered those via my relatives. And yes, used a credit card. If you have more questions, please post in the forum, not here. We can discuss there.

Doubt, but built it!! Hai, I built this line follower. But when I tried auto-calibration, it shows ‘turn_right’ was not declared in this scope.

Code Can you please give me the code for auto-calibration?

4 sensor I want to make a 4 sensor Line Follower, changing the NUM_SENSORS to 4 and making the appropriate changes in the code will the robot work? , Also i would be using IR array with digital outputs.

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PID Based Line Follower

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mattyrjackson1 September 2, 2020, 9:29am 29

It says in the TB6612FNG datasheet that Vcc should typically be 3V (peak value 5.5V).

Also, could you not just run Vcc and VMOT off the arduino and cut out the need for batteries to power the motors?