Modern casino slot machine games are controlled by computer chips and software, and the winning percentages are pre-programmed into the software.
Casino slot machines have RNGs that are continually generating combos, even when the machine is not currently being played.
Running in unison with the RNG of the casino one-armed bandit is the pay out %.
The pay out percent controls just how much the one-armed bandit will payout, for example the payout percent could be 90%, which means the slot machine will pay 90% of all the bets played, and the casino gets to keep 10%.
This is not to say that each time you bet 10 credits you will receive 9 in return – where is the fun … fascination in that? Instead, the casino slot machine will not payout for a while, and then suddenly hit a hot streak and you might catch the big pot prize.
The payout percentages will tend to vary between the different games and some of the extremely famous casinos, for instance Golden Online Casino, which offers a payout rate of up to ninety-five per cent!
Therefore, in essence, the slot machine takes all the $$$$$ played into it and pays it out to a number of privileged winners. The casino only gets to keep a fairly low % of all the odds made.
The casino slot machine software controls any part of the machine, from the blinking lights to the rotating of the reels.
When you hit spin on the slot machine game, a combination is developed by the RNG which relates to the pictures on the reel.