Modern casino slot machines are controlled by computer chips and software, and the win percentages are pre-programmed into the software.
Casino slot machine games have RNGs that are continually generating combinations, even when the machine is not active.
Running in unison with the RNG of the casino one-armed bandit is the payout rate percent.
The pay out per cent controls just how much the slot machine will pay out, for example the pay out per cent might be ninety percent, which means the one arm bandit will pay out ninety percent of all the stakes played, and the casino only gets to keep 10 percent.
This is not to say that each and every time you bet ten credits you will receive nine in return – where is the fun and excitement in that? Instead, the casino one arm bandit will not payout for a little while, and then suddenly fire up a hot streak and you might draw the big pot prize.
The pay off percentages will vary between the alternate games and a few of the most common casinos, like Golden Online Casino, which offers a pay out of up to ninety five percent!
Thus, in essence, the one-armed bandit takes all the $$$$$ played into it and pays it out to a couple of lucky winners. The casino only gets to keep a averagely small percentage of all the wagers allotted.
The casino slot software controls every single part of the machine, from the flashing lights to the rolling of the reels.
When you hit spin on the slot machine, a combination is generated by the RNG which corresponds to the pictures on the reel.