Modern casino Slots are controlled by computer chips and software, and the winner percentages are preprogrammed into the gaming software.
Casino slot machines have Random Number Generators which are endlessly generating combinations, even when the machine is not currently being played.
Running in unison with the random # generator of the casino slot machine is the payout percentage.
The pay out % controls how much the one-armed bandit will pay, for eg the payout percentage might be ninety per cent, which means the slot machine will pay out 90% of all the bets played, … the casino will then get to keep 10 per cent.
This is not to say that each time you bet 10 credits you will receive 9 in return – where is the fun and excitement in that? Instead, the casino slot just won’t pay out for a while, and then suddenly fire up a hot streak and you might catch the big grand prize.
The pay off %s will most likely vary between the alternate games and a couple of the highly favored casinos, e.g. Golden Online Casino, which provides a payout of up to ninety five per cent!
So, in essence, the one-armed bandit takes all the currency played into it and pays it out to a handful of fortunate winners. The casino only gets to keep a relatively small % of all the wagers allotted.
The casino slot software controls every single part of the machine, from the flickering lights to the circulating of the reels.
When you hit spin on the slot machine game, a combination is generated by the RNG which corresponds to the pictures on the reel.