Slot machines have been one of the most popular forms of casino games for many many years. Since its inception in 1891, the slot machine has been one the most successful and the most revenue earning machines and games for casinos everywhere. Slot machines were first installed by casinos as a diversion for novice players. Unlike conventional table games (such as blackjack or craps), slot machines do not require any experience of gaming, and with a very small bet, anybody can get into the game. Slot machines gradually moved off the sidelines to become the most successful and most lucrative game in town, taking in more than 60 percent of the total gaming revenues in the United States. This concept proved to be a monstrous hit. 

Slot machine technology has also altered a lot over the years. Computer-controlled computers have almost entirely replaced the classic mechanical designs. But the game stayed the same. To rotate a series of reels (typically three) that have images written on them, the player pulls a stick. You win if each reel displays the same winning picture along the pay line (certain single images are sometimes winners as well). The money you earn—the payout—depends on the photos that fall in the pay sheet. A complex arrangement of gears and levers works on the traditional slot machine concept. A metal shaft, which holds the reels, is the core feature. This shaft is attached to a handle mechanism that pushes objects. A braking mechanism brings the rotating reels to a stop and the location of the reels is transmitted to the payoff system by sensors. Initially, a coin detector registers that a coin has been inserted and activates a brake to allow the handle to shift.

When a person pulls the handle on a slot machine, a sequence of events takes place. There is a rundown here:

A hook mechanism rotates the handle, which hooks the kicker, dragging it forward (toward the player).

A catch picks a control cam piece on the opposite end of the kicker and pivots it forward. A variety of gears linked to the control cam are rotated by this. The control cam is driven back to its original location by a spring, but the gear assembly greatly slows it down—the gears serve as a mechanical delay

It releases a spring-mounted cam plate running across the back of the unit while the control cam is pivoted forward.

The control cam takes out the stoppers from the notched disks as well. It drives the stoppers against multiple catches on the cam plate while the kicker keeps going. These keep the stoppers in place so that they can spin easily on the discs and reels.

The kicker paddles drive the disks forward briefly as the handle begins to transfer the kicker. The bottom of the hook mechanism moves up against a slanted surface as the handle is pushed all the way back and the kicker has gone through the disks. The slant pivots the hook forward, allowing the kicker to drop it.

The spring of the kicker jerks the kicker backwards at a decent clip. On the discs, the kicker paddles reached the notches, easily rotating the reels.

The control cam is slowly returning to its original location as all of this is happening. It moves the cam plate back as it does return, which activates the stoppers. Each stopper springs forward and locks into a notch, holding the reel in position.
For online slot machines such as slot online malaysia, the rules and principles are the same except for the mechanisms. Online slot machines mostly use random number generators to generate the chances of winning and losing. To learn about the dangers of underground poker, click here.