Modern casino slot machines are controlled by computer chips and software, and the win %s are pre-programmed into the game software.
Casino Slots have Random Number Generators which are eternally generating combinations, even when the slot machine is not active.
Running in unison with the random # generator of the casino slot machine is the pay out rate percentage.
The pay out percent controls just how much the slot machine game will payout, for eg the payout % may be 90%, meaning the slot game will pay ninety percent of all the stakes played, … the casino simply gets to keep 10 percent.
This really does not mean that for every time you bet ten credits you will receive nine in return – where is the fun … excitement in that? Instead, the casino one arm bandit just will not pay out for a while, and then suddenly go on a hot streak and you might draw the big top prize.
The profit percentages will very likely vary between the a variety of games and a few of the extremely established casinos, such as Golden Online Casino, which hands out a pay out rate of up to 95 %!
Therefore, in essence, the slot machine takes all the currency played into it and pays it out to a number of privileged winners. The casino only gets to keep a considerably tiny percentage of all the bets placed.
The casino slot software controls any part of the machine, from the flashing lights to the rotating of the reels.
When you hit spin on the slot machine, a combination is formed by the RNG which relates to the pictures on the reel.