I am working on a line followe robot without using a microcontroller. I have used comparator lm339n, motor driver l293d, 2 analog IR sensors, power supply board having a 7805 regulator IC. I have achived the required speed but the sensors are bit slow or something like that. The robot is perfect at minor turns but at sharp turns the sensing is not enough. Is there any way i can improve my robot's sensing? I was said to increase the number of sensors but how can i make that possible? I have run out of pins on the VCC and GND of the power supply board and also on the input part of the comparator. Thankyou very much. I am about to take part in a competition and if i can manage to make these sharp turns, i am definitely the winner before the tournament starts. I have supplied 7.2v to the motors and they are around 100 rpms. Thankyou very much,
Are you sure it is not your code? You can easily write code that can handle minor turns but fails when your robot tries to drive on something sharper. You probably need some PID.
would be to place the sensors farther in front of the robot. Look at the design of http://www.dailymotion.com/video/xador9_very-fast-line-follower-robot_tech&sigs=12ad1qjiq that robot. I am fairly sure it has a microcontroller, but, that was a design choice not a requirement. I would like to see your schematic. I am curious how you are using all the inputs of your quad input comparitor w/ only 2 sensors.
This is really a fantastic idea. However, i still have not tested it, it shoul work great. I’ll get to you as soon as i have tried this new way.
Actually, when testing with the multimeter, only two input pins were detected. There are not enough pins on the comparator board. On the lm339n comparator, there are 14 pins but on the comnparator board only 8 pins are available so that’s why maybe there are not enough input pins.
Real thanks for your idea and i;ll definitely check it out.
