User manual

Robotics experiment with PIC microcontroller l 53
A3.2 Remove the downlaod cable from Robo-PICA. Place the robot on the floor. Turn-
on power to run the program. See the operation.
The robot will move forward 2 seconds and spin left 0.8 second and foward 2
seconds again. Next, it will spin right 0.8 second to change the direction and forward
2 seconds, moves backward 1 second and stop movement finally. In each changing
movement, thr robot will beep a sound to report the operation.
However it is possible the robot moves in an incorrect direction. If this happens,
pleae check the motor cable connection. You can change the motor connection
from black to white connector and white to black connector in each motor output.
You can see the LED indicator of DC motor output. During forward movement,
both LEDs must light Green color. In backward movement, both LEDs light Red color.
Must change until the movement direction is corrected and remember or fix the cor-
rect connection for all activities onwards.
This is the limitation of malfunctioning, We do not know about the correct pole
of DC motor. But we can control and fix with hardware and software via DC motor
control circuit. This problem can be easily fixed and it is important to know and
understading this.
E
Because the robot use battery to power source. In during the battery level is
full power and not full, the speed of movement is not equal. It cause the dis-
tance from movement may be not equal. It is limitation of all robot that use
open loop movement control.