Modern casino slot games are controlled by computer chips and software, and the win percentages are preprogrammed into the gaming software.
Casino slot machines have Random # Generators which are continually generating combinations, even when the slot machine is not active.
Running synchronously with the Random Number Generator of the casino slot machine is the pay out rate percent.
The pay out percentage controls just how much the slot machine game will pay out, for example the pay percentage may be 90%, meaning the slot machine game will pay ninety percent of all the wagers played, and the casino gets to keep ten percent.
This doesn’t mean that every time you bet 10 credits you will receive 9 in return – where is the fun and exhilaration in that? Instead, the casino slot won’t payout for a bit, and then suddenly go on a hot streak and you might draw the big jackpot prize.
The pay off percentages will most likely vary between the different games and a few of the extremely established casinos, e.g. Golden Online Casino, which gives a payout of up to ninety-five percent!
So, in essence, the slot machine game takes all the cash played into it and pays it out to a couple of lucky winners. The casino only gets to keep a fairly small percent of all the bets placed.
The casino slot software controls every 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 developed by the RNG which relates to the pictures on the reel.