The video slots’ design resembles the technology of old machines, but only on the outside. Generally, physical slot machines have over 20 symbols per reel. Sensors communicate the reel positions to the payout system. A metal shaft in the center supports the spinning reels, while a braking system stops the reels. The coin detector registers when you insert coins to play slot games and unlocks the brake, allowing the handle to move.

The Mechanism Behind Early Slot MachinesĬonventional, mechanical slot machines use a series of gears and levers to operate. These symbols range from a few dozen to hundreds, depending on the particular slot machine. The number of reels is typically three or five, each with a different number of symbols. The player pulls the lever or pushes a button that activates a series of reels, determining the outcome. The same principle applies whether you play a game on a modern slot machine or on an old-timer. You receive a payout if the symbols line up in a winning combination.īefore proceeding further, let’s briefly review slot machine technology to understand better old and modern slot machines and how they differ. The amount of the payout depends on the symbols that you end up landing on and the machine paytable. These numbers determine where the symbols land on the screen. When you spin, the machine randomly selects a series of numbers.

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