I have recently started working on 9 LED Knight Rider Circuit on a breadboard. All the connections have been done according to the circuit diagram given in this article. But I am having a problem with it - The light is running only one way instead of coming back and forth. Can anybody identify the problem and suggest me the modifications to be done to this circuit arrangement?
Try this, which is probably the original. It's available on this website. The schematic you linked has many problems, such as outputs shorted to ground or to other outputs, inputs connected to inputs only (transistor drive) etc.
Connect each LED with a series resistor from each output \$Q_I\$ to ground.