I already had a 5 MP 175 degree wide angle fish eye camera that I wanted to use for this build. I modified the front panel to make it suitable for this camera. I printed the rubber wheels with my Prusa i2, the rest with my Kossel XL. I bought 100 gram flexible filament for the wheels. I used a FET (BS170) instead of the transistor to switch the LED's. I already had that component and it works just as well for this goal. A bigger heat sink is ordered, the one on the photo is for cooling a stepper driver. The robot is quite sensitive to steering commands and hard to control, not sure if the wider image from the fish eye lens plays a role in this.