Modern casino one armed bandits are controlled by computer software, and the winner percentages are pre-programmed into the computer software.
Casino slot machine games have RNGs which are constantly generating combinations, even when the game is not active.
Running synchronously with the random # generator of the casino slot machine is the payout rate %.
The payout percent controls just how much the slot machine game will pay, for e.g. the pay out percentage might be 90%, which means the slot game will payout 90% of all the stakes played, … the casino simply gets to keep 10%.
This does not imply that every time you bet ten credits you will receive nine in return – where is the fun … exhilaration in that? Instead, the casino slot machine game won’t payout for a little while, and then suddenly fire up a hot streak and you might draw the big grand prize.
The pay out percentages will vary between the differing games and some of the extremely famous casinos, e.g. Golden Online Casino, which provides a pay out of up to 95 percentage!
As a result, in essence, the one-armed bandit takes all the currency played into it and pays it out to several chosen winners. The casino only gets to keep a fairly low percent of all the stakes put out.
The casino slot machine software controls each and every part of the machine, from the dazzling lights to the revolving of the reels.
When you hit spin on the one-armed bandit, a combination is set up by the RNG which corresponds to the pictures on the reel.