Modern casino Slots are controlled by computer software, and the winning percentages are preprogrammed into the gaming software.
Casino Slots have Random Number Generators that are continuously generating combinations, even when the machine is not currently being played.
Running simultaneously with the RNG of the casino slot machine is the pay out rate percentage.
The pay out % controls how much the slot machine will pay out, for example the pay % might be 90%, meaning the slot machine game will payout 90% of all the stakes played, … the casino gets to keep ten 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 thrill in that? Instead, the casino slot just will not pay out for a bit, and then suddenly go on a hot streak and you might draw the big top prize.
The payout %s will most likely vary between the different games and some of the very famous casinos, e.g. Golden Online Casino, which offers a payout of up to ninety-five %!
Thus, in essence, the slot machine takes all the money played into it and pays it out to a few chosen winners. The casino only gets to keep a generally tiny % of all the bets placed.
The casino one armed bandit software controls any part of the machine, from the flashing lights to the circulating of the reels.
When you hit spin on the slot machine, a combination is put together by the RNG which is linked to the pictures on the reel.