Modern casino slot machine games are controlled by computer chips and software, and the win percentages are preprogrammed into the computer software.
Casino slot machines have Random Number Generators that are ceaselessly generating combinations, even when the slot machine game is not being played.
Running concurrently with the random # generator of the casino slot machine game is the pay out percentage.
The payout percent controls how much the slot machine will pay, for e.g. the pay percent may be ninety per cent, which means the slot machine will pay ninety percent of all the bets played, … the casino only gets to keep 10 percent.
This really does not mean that every time you bet 10 credits you will receive nine in return – where is the fun … thrill in that? Instead, the casino slot machine just won’t payout for a little while, and then suddenly jump on a hot streak and you might draw the big top prize.
The pay off %s most likely will vary between the various games and some of the notably acclaimed casinos, for e.g Golden Online Casino, which tenders a pay out of up to ninety five per cent!
This means that, in essence, the slot machine takes all the $$$$$ played into it and pays it out to a couple of fortunate winners. The casino only gets to keep a fairly small percentage of all the gambles made.
The casino one armed bandit software controls each and every part of the machine, from the dazzling lights to the rolling 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.