here is an autonomous robot that has a plc as brain and an IR sensor with relay output.When the sensor detects an object, it will turn away from the object.
I have been very inspired by Frits robot with the yellow wheels.
I use a speed controller from velleman electronics to control the speed of the 2 gearmotors, and the servomotor is without electronics I control it with af relay and the potentiometer in the servo goes to an input on the plc, so the robot knows where the sensor is and which way it must turn.
The sensor turns from side to side and stops when it detects an object and starts again when there is no object
finaly Easter and more freetime to play with my robot. I added a new video and some
I added a motorcontrol to the pwm motorcontroller so that the robot starts slowly and stops slowly ( the 3 last pictures) watch video
Update: 12/4 2009
Found this inside a old computermouse 3 encoders and some switches