I noticed your motors were humming. Its better to increase the PWM frequency until the sound goes away . . .
Yeah, I know, but when I increase the PWM, the speed increases too much.
I'm having a hard time to slowly drive the HummBot forward. Basically going slow means the motor is close to stalling, which is not good...
I want to take at least to measures:
1. install a high torque motor that allows me to drive with lower rpm.
2. install an encoder that allows me to detect the speed/covered distance.
Any other suggestions are welcome!
Btw. I made a third video of the HummBot, it now includes two IR sensors to detect obstacles. I will also add two ultrasonic sensors for larger range (2-3 meter) object detection.