Modern casino one armed bandits are controlled by computer software, and the winning percentages are pre-programmed into the computer software.
Casino slot machines have Random # Generators that are eternally generating combinations, even when the slot machine is not currently being played.
Running in unison with the Random Number Generator of the casino slot machine is the payout percentage.
The payout percentage controls how much the slot machine will pay out, for example the pay out % may be 90%, meaning the slot game will pay ninety percent of all the bets played, and the casino will then get to keep ten percent.
This doesn’t mean that each and every 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 while, and then suddenly start up a hot streak and you might hit a big top prize.
The pay out %s will tend to vary between the different games and some of the extremely popular casinos, for e.g 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 number of privileged winners. The casino only gets to keep a considerably tiny per cent of all the odds placed.
The casino one armed bandit software controls each and every part of the machine, from the flickering lights to the revolving of the reels.
When you hit spin on the slot machine, a combination is developed by the RNG which corresponds to the pictures on the reel.