Hello there fellow makers!

I've been looking for a nice robot framework and I've tried out many of these ... eventually (like most programmers do ) I've decided that I should develop my own robot framework!

So What it is so special about 'Bob The Robot' ?

It uses two Ultrasonic Sensors so your robot can respond faster
It uses a pair of geared n20 motors ( I use 1:100 reduction ) so you can get some power and nice speed
Wheels, Frame and robot body can be 3D printed
It's cheap!

This robots is part of my robot swarm project, so you can build more than one :)

Step 1: 3D Printing and Assembly

To build a Bob you'll need :

3D print the frame, wheels and some more parts which can be found here http://www.thingiverse.com/thing:1409401
m3 screws (10mm should be fine) and nuts
2x 60mm x 3.5mm Mechanical Nitrile Rubber O Ring Oil Seal W6 ( for tires )
Brass Knurl Nuts M3*4mm (used for the m3 screws)

You'll also need the following parts for electronics :

Arduino nano
Arduino nano sensor shield
Mini L293D Motor Shield
2x Ultrasonic HC-SR04 Sensor
2x n20 100RPM Mini Metal Gear Motor
Battery to power the whole thing, I’ve used Wild Scorpion 7.4V 1100mAh due to its compact size
Mini 2 Pin SPST ON-OFF Switch 8.5x13.5MM ( can be found on ebay)
Some wires to connect the modules (mostly female-to-female )