A very simple 10 LED roulette wheel circuit is shown here. pressing the button starts the LEDs in a rotational motion (sequencing) at full swing initially, and gradually slows down, until it stops to a particular, randomly selected LED.
The randomness of the selection depends upon the time for which the push remains switched ON by the finger. Even a difference of 0.1 second is able to change the position of the final LED position, making the roulette application highly foolproof.10 LED
Simple Roulette Wheel Circuit Diagram