Modern casino one armed bandits are controlled by computer software, and the win percentages are preprogrammed into the game software.
Casino slot machine games have Random Number Generators which are constantly generating combos, even when the game is not being played.
Running jointly with the random # generator of the casino slot machine game is the payout percent.
The payout per cent controls just how much the one-armed bandit will payout, for eg the pay out percent might be 90%, which means the one arm bandit will pay 90% of all the wagers played, and the casino gets to keep ten per cent.
This does not mean that for every time you bet 10 credits you will receive 9 in return – where is the fun and excitement in that? Instead, the casino one arm bandit will not pay out for a while, and then suddenly hit a hot streak and you might hit a big jackpot.
The pay out percentages shall vary between the a variety of games and just a few of the highly acclaimed casinos, for example Golden Online Casino, which gives a cash payment of up to ninety five per cent!
So, in essence, the slot machine takes all the currency played into it and pays it out to a couple of fortunate winners. The casino only gets to keep a relatively tiny % of all the wagers put out.
The casino slot software controls every part of the machine, from the blinking lights to the circulating of the reels.
When you hit spin on the slot machine game, a combination is formed by the RNG which relates to the pictures on the reel.