Modern casino slots are controlled by computer chips and software, and also the win percentages are preprogrammed in to the software.

Casino slots have Random Number Generators (RNG) which are continually generating combinations, regardless if the machine is not being played.

Running concurrently with the RNG of the casino slot machine will be the payout percentage.

The payout percentage controls the amount the slot machine will payout, for learn online gambling site example the payout percentage could possibly be 90%, meaning the slot game will payout 90% of all of the bets played as well as the casino only gets to keep 10%.

This isn't to claim that every time you bet 10 credits you shall receive 9 in return - where is the fun and excitement in that? Instead the casino slot machine game will not pay out for a while, and then suddenly go on a hot streak and also you might hit a big jackpot.

So in essence the slot machine takes all the money played into it and pays it out to few lucky winners. The casino only gets to keep a relatively small portion of all the bets placed.

The casino slot software controls every a part of the machine, from the flashing lights to the spinning of the reels.

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