Modern casino slot machines are controlled by computer chips and software, and the winner percentages are pre-programmed into the software.
Casino Slots have Random # Generators that are continuously generating combos, even when the machine is not being played.
Running collectively with the Random Number Generator of the casino slot machine is the pay out rate per cent.
The pay out percent controls just how much the slot machine game will payout, for e.g. the payout percentage might be ninety per cent, meaning the one arm bandit will pay out 90% of all the wagers played, and the casino gets to keep 10 percent.
This does not mean that each time you bet 10 credits you will receive nine in return – where’s the fun and exhilaration in that? Instead, the casino slot machine game will not payout for a bit, and then suddenly start up a hot streak and you might hit a big jackpot prize.
The payoff %s will very likely vary between the different games and just a few of the most famous casinos, for example Golden Online Casino, which offers a payout rate of up to 95 per cent!
As a result, in essence, the slot machine takes all the currency played into it and pays it out to a few privileged winners. The casino only gets to keep a averagely small per cent of all the odds allocated.
The casino slot software controls any part of the machine, from the flashing lights to the spinning of the reels.
When you hit spin on the one-armed bandit, a combination is developed by the RNG which corresponds to the pictures on the reel.

