Modern casino Slots are controlled by computer chips and software, and the win percentages are pre-programmed into the software.
Casino slot machines have Random # Generators that are eternally generating combinations, even when the slot machine is not active.
Running in unison with the RNG of the casino slot machine is the payout per cent.
The payout per cent controls how much the one-armed bandit will pay, for e.g. the pay percent could be ninety percent, meaning the slot machine game will pay 90% of all the wagers played, … the casino only gets to keep 10%.
This does not imply that each and every time you bet 10 credits you will receive nine in return – where is the fun … thrill in that? Instead, the casino slot will not payout for a while, and then suddenly jump on a hot streak and you might draw the big pot prize.
The pay out %s most likely will vary between the various games and several of the most established casinos, for example Golden Online Casino, which provides a payout rate of up to ninety-five %!
Thus, in essence, the slot machine takes all the cash played into it and pays it out to a couple of privileged winners. The casino only gets to keep a generally small percentage of all the stakes allocated.
The casino one armed bandit software controls each part of the machine, from the flashing lights to the circulating of the reels.
When you hit spin on the slot machine game, a combination is formed by the RNG which associates with the pictures on the reel.