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Continuous rotation servos should also work well. Since the rpm of these servos are generally low, small wheels like the one used here might have to be replaced with large diameter ones.
I hope you are getting +ve angles when tilting the robot forward and -ve when tilting backward. Now you need to check whether the connections to the motor are done correctly. You can use the setMotors() in your loop and comment out all the other lines of code in your loop. The function works this way: setMotors(leftMotorSpeed, rightMotorSpeed). +ve value of motorSpeed gives forward rotation and -ve gives reverse rotation. Check both motors for speed and direction by giving different values for leftMotorSpeed and rightMotorSpeed ranging from -255 to +255.
I haven't made a schematic yet. But I hope I have made the circuit clear using the perfboard layouts and the block diagram given in Step 2. Do let me know if there is any doubt.
Thank you. Once you've finished yours please share it here. All the best.
I hope you have placed the MPU6050 exactly as shown in the picture. You can also upload the codes in steps 3 & 4 and check whether the angle of inclination is correct (+ve while tilting forward and -ve while tiliting backward)
Thank you. I'm happy to know that you liked my previous instructable as well.
Arduino Self-Balancing RobotView Instructable »
You will need a programmer. I've used USBasp.Did you try extracting the rar file? You will find main.c in it. Let me know if there's some issue.
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