Modern casino slot machines are controlled by a computer, and the win percentages are preprogrammed into the computer software.

Casino slot machines have Random # Generators which are eternally generating combos, even when the slot machine game is not currently being played.

Running side by side with the random # generator of the casino one-armed bandit is the pay out %.

The payout percentage controls how much the slot machine game will payout, for e.g. the pay per cent could be 90%, meaning the one arm bandit will payout 90% of all the wagers played, and the casino only gets to keep ten percent.

This does not mean that every time you bet 10 credits you will receive nine in return – where is the fun … excitement in that? Instead, the casino slot just won’t payout for a little while, and then suddenly jump on a hot streak and you might catch the big grand prize.

The pay out %s usually will vary between the alternate games and a handful of the notably popular casinos, for e.g Golden Online Casino, which tenders a pay out of up to ninety five per cent!

This means that, in essence, the slot machine game takes all the money played into it and pays it out to a few fortunate winners. The casino only gets to keep a averagely low percentage of all the gambles placed.

The casino slot software controls any part of the machine, from the flickering lights to the spinning of the reels.

When you hit spin on the slot machine, a combination is developed by the RNG which corresponds to the pictures on the reel.