Hello everybody,
I am making a project for my school, and I want to control my robot with some PID, but I do not understand how to retrieve information from the positions of the servo-motors ?
Is that possible o should I look for another robot ?
thanks for your answers.
You can not get the position from analog servos. There is a project called Open Servo, which creates custom electronics to replace the electronics boards in standard servos. The Open Servo does allow you to read the position of the servo and do many other things standard servos do not allow you to do, such as use I2C to control the servos as well as standard R/C PWM signals. However, the Open Servo is not for somebody who has no electronics knowledge as it requires disassembling a servo and some soldering. You can purchase already assembled Open Servo control boards though.
8-Dale
okidoki,
thanks for your fast answer 
