Modern casino slot games are controlled by computer chips and software, and the win %s are pre-programmed into the computer software.
Casino one armed bandits have Random Number Generators which are continually generating combinations, even when the slot machine is not active.
Running synchronously with the RNG of the casino slot machine is the pay out rate percentage.
The payout percentage controls just how much the slot machine game will pay out, for example the pay % may be ninety per cent, meaning the slot machine game will payout ninety percent of all the bets played, and the casino simply gets to keep 10 per cent.
This does not imply that every time you bet ten credits you will receive 9 in return – where’s the fun … exhilaration in that? Instead, the casino one arm bandit won’t payout for a little while, and then suddenly fire up a hot streak and you might catch the big jackpot prize.
The pay off %s will tend to vary between the differing games and a few of the very acclaimed casinos, for example Golden Online Casino, which hands out a payout of up to 95 percent!
Hence, in essence, the slot machine takes all the $$$$$ played into it and pays it out to a couple of privileged winners. The casino only gets to keep a relatively minute % of all the bets allocated.
The casino slot software controls every single part of the machine, from the flashing lights to the revolving of the reels.
When you hit spin on the slot machine game, a combination is produced by the RNG which is linked to the pictures on the reel.