Modern casino one armed bandits are controlled by computer chips and software, and the win percentages are preprogrammed into the software.
Casino Slots have Random Number Generators which are continuously generating combinations, even when the slot machine game is not being played.
Running synchronously with the RNG of the casino slot machine game is the pay out rate percentage.
The payout percentage controls just how much the slot machine will pay, for e.g. the payout % could be ninety per cent, meaning the one arm bandit will payout ninety percent of all the bets played, … the casino only gets to keep ten per cent.
This does not mean that for every time you bet ten credits you will receive nine in return – where’s the fun and excitement in that? Instead, the casino slot will not pay out for a little while, and then suddenly go on a hot streak and you might draw the big top prize.
The payoff percentages most likely will vary between the various games and a handful of the very common casinos, for instance Golden Online Casino, which puts forth a payment of up to ninety-five per cent!
This means that, in essence, the slot machine game takes all the $$$$$ played into it and pays it out to a few fortunate winners. The casino only gets to keep a averagely minute % of all the plays made.
The casino slot software controls each and every part of the machine, from the flickering lights to the rolling of the reels.
When you hit spin on the one-armed bandit, a combination is put together by the RNG which associates with the pictures on the reel.