I've just started playing around with an Arduino Uno and I have substantial programming experience but little to no understanding of electronics. I am trying to build a small robot which can drive around and avoid running into things. I wanted to start by simply connecting the motors (based on this starter project: http://lemasney.com/consulting/2014/10/12/arduino-starter-kit-project-09-motorized-pinwheel/), but when I switch it on it just stays put.
The basic way I connected everything looks like this, could anyone tell me what I may be doing wrong? I am trying to power everything using a 9V battery.
The robot itself currently looks like this (feel free to mock my soldering):
(I am using this chassis)
Any help is appreciated! :-)