This is my sentry robot built from scratch.
It is 4 and half feet tall.
At the top is a PTZ camera with 27 times optical zoom.
Just above the main body there are 4 fixed cameras each convering a 90 degree view: front, left, right, back. I hate the idea of anyone or anything sneaking up on me (I mean the robot)
There is a rather large 802.11abg antenna on the robot and using a similar one mounted on my house I have allowed the robot to get quite a fair distance from my home, though only wondering the streets in the dark of night.
The robot can operate as both a real, autonomous robot and as an RC vehicle.
It can do things like find a red ball on its own or search for other objects.
It records high quality MPEG2 video in its internal harddrive and transcodes to low bit rate MPEG4 for transmission over the wireless link.
I have a joystick based steering interface for both the robot drive and the PTZ drive.
I have two "brain" modules I use with the robot. A low power one that allows RC operation extending the life of the batteries, and a high power one which I use for autonomous operation and includes a fair amount of CPU power to run the machine vision algorithms fast enough to deal with the real time interactions with the environment
This robot is fast by the way. It has been clocked at 12mph on level ground.
The robot has two way audio. My dog hates taking commands from it, but she has learned to listen.
My next effort is to figure out a way for it to sign for UPS or Fedex deliveries.