Modern casino one armed bandits are controlled by computer chips and software, and the winning percentages are preprogrammed into the computer software.
Casino Slots have Random Number Generators that are continually generating combinations, even when the game is not currently being played.
Running in unison with the RNG of the casino slot machine game is the pay out percentage.
The payout per cent controls just how much the slot machine game will pay out, for e.g. the payout percentage could be ninety percent, which means the slot machine game will pay ninety per cent of all the bets played, … the casino simply gets to keep 10 percent.
This doesn’t mean that every time you bet 10 credits you will receive nine in return – where’s the fun … thrill in that? Instead, the casino one arm bandit will not payout for a little while, and then suddenly start up a hot streak and you might hit a big jackpot prize.
The payout %s will vary between the alternate games and a couple of the highly acclaimed casinos, e.g. Golden Online Casino, which hands out a payout of up to 95 %!
So, in essence, the one-armed bandit takes all the money played into it and pays it out to a handful of chosen winners. The casino only gets to keep a generally indistinct percentage of all the plays made.
The casino slot software controls every part of the machine, from the blinking lights to the revolving of the reels.
When you hit spin on the one-armed bandit, a combination is developed by the RNG which relates to the pictures on the reel.