Modern casino Slots are controlled by computer chips and software, and the win %s are pre-programmed into the software.
Casino slot machines have RNGs which are constantly generating combinations, even when the game is not being played.
Running synchronously with the RNG of the casino slot machine is the payout rate %.
The payout percentage controls how much the one-armed bandit will pay out, for example the payout percent may be 90%, which means the one arm bandit will payout 90% of all the bets played, … the casino will then get to keep 10 per cent.
This really does not mean that each time you bet ten credits you will receive nine in return – where is the fun and thrill in that? Instead, the casino slot just will not pay out for a little while, and then suddenly start up a hot streak and you might draw the big jackpot prize.
The pay out %s will vary between the different games and just a few of the extremely popular casinos, e.g. Golden Online Casino, which offers a payment of up to ninety five percent!
This means that, in essence, the slot machine takes all the currency played into it and pays it out to some chosen winners. The casino only gets to keep a fairly indistinct % of all the stakes allotted.
The casino one armed bandit software controls any part of the machine, from the blinking lights to the revolving of the reels.
When you hit spin on the one-armed bandit, a combination is generated by the RNG which relates to the pictures on the reel.