Modern casino one armed bandits are controlled by a computer, and the winner %s are preprogrammed into the software.
Casino slot games have Random Number Generators which are constantly generating combinations, even when the machine is not being played.
Running in unison with the RNG of the casino one-armed bandit is the pay out rate %.
The payout % controls just how much the one-armed bandit will pay out, for e.g. the payout percent could be 90%, which means the slot game will pay out ninety per cent of all the bets played, … the casino will then get to keep 10 per cent.
This does not mean that every time you bet ten credits you will receive nine in return – where’s the fun and excitement in that? Instead, the casino slot just will not payout for a bit, and then suddenly jump on a hot streak and you might hit a big top prize.
The payoff percentages will tend to vary between the various games and a couple of the very established casinos, for e.g Golden Online Casino, which gives a cash payment of up to 95 %!
As a result, in essence, the slot machine takes all the currency played into it and pays it out to some lucky winners. The casino only gets to keep a fairly tiny percent of all the odds made.
The casino slot machine software controls every single part of the machine, from the blinking lights to the circulating of the reels.
When you hit spin on the slot machine game, a combination is generated by the RNG which connects with the pictures on the reel.