Robocon

[Egyptian]

Hi, thanks for the fourms , im ahmed , from egypt , i wanna ask some questions about Robocon ...

1. What kind of sensors ur using ? last year i used LDR + Visible it worked but it was bad , i wanna use phototransistor this year , could u provide me the circuit please ? i know many circuits about it , like using compartor ..etc, but i wanna hear from someone who tried it ^^ .

2. U Put many sensors like an array or what ?
3. How do u let the robot move in straight line in that fast speed , is that a problem of software like using PWM or mechaincal problem ?

4. Regarding Robocon 2007, should i carry the blocks myself and go to every tower ? but there are no guidelines inside the circle .. what are u going to do?

5. in this year i dont wanna use a line follwer technique , instead , i wanna teach the robot by capturing the data from the sensors like encoders , i dont know the algorithm , but did anyone try it ?

thanks alots