raspberry pi

I haven't had the opportunity to actually work with a Raspberry Pi as of yet, but I have done quite a bit of research into it. It would be nice to use in robotics, but I wove to agree with Raimondas Klemka, a microcontroller would probably work better for the application. Possibly the most popular, and easiest to use (at least in my experience), is the Arduino. If you havent already, I would suggest looking into an Arduino Mega, which offers plenty of pins, for plenty of connections. Another bonus with the Arduino is how easily it can be embedded into your project.

Maybe you could use the Pi to program an Arduino?

Yes for controlling something microcontrolles liek arduino mega are better somimes, because the have a lot of pins and some of the processin can be made by microcontroler, and other stuff can be processed by Pi. but Pi can be used for simple computer vision, for controlling arduino over usb and other stuff. but if you need just few I/O then Pi is good to But consider on thinking of usin 2 or more procesosrs, because sometimes it is better to have few less loaded processors or microcontrollers, then to putt it all in one and run it on the limit.

Now I'm thinking on using pi for wifi data transmission. And if it is posable to stream video over 3g network.

You might want to consider using one of these. ( http://wyolum.com/projects/alamode/ )

The RaspberryPi can provide the processing and then hand of the control bit to the Arduino.

You can utilise the wide variety of shields to do the motor control.

Mark

the pi looks to be a good platform for robot control ,  the power to network beeing its main advantage over microcontrolers ,

although usb bandwidth is more of an issue onece you start messing about with video

to handle  3g ( usb dongle ) + 2 webcams  needs a controler with  at least 3 individual host usb ports   not a single host usb port and a hub

as the usb bandwith falls over when running eather  3g and video or twin video

should you be able to streem 2 video feeds over wifi or 3g/4g  link  then you could offload the video to a remote PCL (point cloud library) server cluster providing sterio webcam to 3d mapping  in real time

although looks like  itx pc's or laptop with a network link to a 16 core 3ghz xeon cluster is the way to go

the pi looks to be a good platform for robot control ,  the power to network beeing its main advantage over microcontrolers ,

although usb bandwidth is more of an issue onece you start messing about with video

to handle  3g ( usb dongle ) + 2 webcams  needs a controler with  at least 3 individual host usb ports   not a single host usb port and a hub

as the usb bandwith falls over when running eather  3g and video or twin video

should you be able to streem 2 video feeds over wifi or 3g/4g  link  then you could offload the video to a remote PCL (point cloud library) server cluster providing sterio webcam to 3d mapping  in real time

although looks like  itx pc's or laptop with a network link to a 16 core 3ghz xeon cluster is the way to go