Inside the slot machine is a microprocessor similar to the one in your home computer. Instead of running Word or Excel, it runs a special program known as the RNG. This generates numbers to correspond to the symbols on the reel of the slot machine and decides the outcome of the game cycle. You might say that the RNG is in perpetual motion. Inside the slot machine is a microprocessor similar to the one in your home computer. Instead of running Word or Excel, it runs a special program known as the RNG. This generates numbers to correspond to the symbols on the reel of the slot machine. A typical slot machine contains about 20 stops on each reel, but this can vary. In older slot machines, the lever would actually set the reels in motion. In modern slot machines, however, the lever just triggers the casino game’s software, which, in turn, makes the reels spin. Slot machines may feature several different.
Introduction to How Slot Machines Work
In these series of posts, I continue to answer the most common questions about slot machines asked via Google searches. This post explains the simple question of how slot machines work.
In this post, I will discuss the operational components of a slot machine from the point-of-view of a slots player. Meaning, the various interface areas on the front of a slot machine. These player interface areas include:
- Service Light
- Bonus Display (Optional)
- Pay Table
- Players Club
- Results
- Play Console
- Ticket In, Ticket Out (TITO)
Additional relatively minor interface areas are not listed or shown below. These areas are the locations audio speakers, audio volume control (optional), display lights, lever arm, and a hearing aid jack to accommodate those with a hearing disability.
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Service Light
A slot machine’s service light is generally located at the very top of a slot machine to be easily visible to casino employees. Because of this uppermost location, it’s also known as the candle within slots terminology.
Slots players can switch on the service light by activating the service button on the player console. Or, it will enable by itself if the player wins a hand pay jackpot or the slot machine develops a service fault. Faults might include lack of paper, a full cash-in condition, mechanical or electronic tampering, or an internal electronic failure such as CPU overheating, etc.
Modern casinos have a slot attendant call/dispatcher communication system using a headset and microphone. This setup is helpful for spotting problems on the casino floor. An activated service light automatically notifies the casino operating system. The casino dispatcher then informs the slot attendant responsible for that section of the casino.
Once the notification is sent out, a lit candle is of little practical use. At best, it guides the responding slot attendant the last few feet to the customer needing attention and, also, provides some reassurance to the waiting customer.
How To Work On Slot Machines Machine
Slots players may activate the candle for a multitude of reasons. In general, they do so to deliberately call a slot attendant to their location, for any of a host of reasons only limited by imagination.
Pro-Tip #1: Service Light
Sometimes slots players need to leave a slot machine briefly but don’t want to give it up to someone else. If this break is relatively brief, say 10-15 minutes, use the service button to call over a slot attendant. The slot attendant can temporarily lock up the slot machine at the request of the player.
The slot machine can be unlocked later by the player via insertion of only their service card … or after 10-15 minutes when the temporary lockout automatically expires. For the specific length of lockout times, ask any slot attendant at your casino.
Bonus Display Area
If a specific slot machine has a bonus round available, then it will often have a second display area. Video slots may use the same primary display screen but abruptly display the bonus round game theme instead. However, video slots most often have a secondary display screen available for bonus rounds.
The Bonus Display area is optional and dependent upon the specific slot machine model. The location of this bonus display varies. More often than not, it is high up on the slot machine to be viewable by other players from a distance.
Casinos offset their losses by offering slot machines with bonus round display visible from a distance. Frankly, wins on these highly visible and usually loud bonus displays are seen by many. This obvious win encourages other casino patrons to play slot machines.
Pro-Tip #2: Bonus Round
Bonus rounds generally cannot be activated unless that slot machine’s maximum credits are bet. By not betting maximum credits, the player automatically lowers their odds of winning.
If betting maximum credits on a specific denomination slot machine is not affordable, pick another affordable slot machine. I discuss this approach in detail at Choosing Slot Machines.
Pay Table Area
The Pay Table area lists information on the jackpot amounts for specific reel combinations. It can also display some or all of the game theme rules. This area may be permanently displayed on the slot machine, or possibly only available through an interactive series of images available by touchscreen.
In either case, all possible wins may or may not be displayed. Sometimes the list is highly abbreviated, and displays only the highest jackpots, due to space limitations. Other times, mainly with touchscreen displays, a series of images can be switched between to view every possible winning combination.
However, pay tables typically provide the highest value jackpot. Slot machine game themes with multipliers or “wild” reel symbols have their most top value jackpots being the result of these reel symbols. Alternatively, it may not show all multipliers or “wild” symbols in the tabulated list of win-reel combinations. Instead, they may be in writing along the edge of the paytable interface area.
But, with large touchscreens has come the capability to provide full paytable information along with game theme rules. Some slot machines now have this feature and, perhaps, more will have it in the future.
Many paytables show the number of credits that would be won for a specific combination of reel symbols. Or, they may show a monetary amount. In either case, these tables have separate columns for winning combinations dependent upon how many credits are bet. The far
Some examples of credit and denomination combinations are:
- 1-credit slot machines having a $100 denomination
- 3-credit slot machines having a $5 denomination
- 5-credit “quarter slots” having a $0.25 denomination
- 300-credit “penny slots” have a $0.01 denomination
Pro-Tip #3: Pay Tables
Frankly, learning the paytable of any slot machines played is a relatively easy way to improve the odds of winning at slots. Many typical slots players believe there is no skill involved in winning at slot machines. Casinos gently foster this misunderstanding, as it is to their benefit. Don’t fall for it.
Traditionally, slots players find it acceptable to play slot machines with visual succinct paytables. Frankly, casinos would instead have their customers spend their time playing a game they don’t understand
One easy-to-learn skill to improve the odds of winning at slots is choosing which slots to play based on their paytables. I discuss this in detail at Choosing Slot Machines.
Players Club Area
The Players Club area contains a card reader, numbered keypad, and a small display. A security feature of players club cards is for players to choose a PIN to enter when they wish to access their player account.
Newer-style slot machines have a touchscreen display, which removes the need for a physical keypad. Meaning, it’s part of the touchscreen display.
Bets can be made on a slot machine without a players’ club card. At most casinos, it typically is not required. Neither is the PIN needed to play the device or view basic information. For example, a running total of reward points earned during the current play session is generally on display.
The PIN is required, however, to:
- access certain portions of player’s casino account
- transfer banked funds
- activate “free play” provided by the casino as a complimentary gift
Results Area
The Results interface area is where the reel combinations are seen after making a bet. Whether a video slot machine or a slot machine with physical reel, this is where the results of a bet are provided.
Interpreting whether a reel combination is a winner requires an understanding of the paytable. This result is fundamental to how slot machines work.
Of course, the slot machine will immediately display the results. A small display beneath the reels shows:
- the total amount of money or credits available in the machine
- how many credits most recently bet
- the jackpot amount won if any
Jackpots are usually in credits, where each credit equals the denomination of the machine rather than the amount bet, as well as a monetary amount.
Player Console
The Play Console typically has physical buttons, a cash/ticket reader, and a ticket printer. The buttons include:
- Cash Out for requesting the removal of any player funds in the machine
- Service to request a casino attendant
- A Series of Buttons for selecting the number of credits to bet, or placing the maximum possible bet
- Cash Out for removing any remaining bankroll
- Repeat to making another bet for the same credit(s)
- Denomination to select a specific bet denomination (optional)
The player console may have several possible button configurations, dependent upon the model of the slot machine. Given how often game themes are switched to maintain the interest of players over time, it is common for player consoles to be standardized over many machines within a casino.
Also, it is becoming common for consoles to have embedded displays visible through their semi-transparent button covers. This array of small screens are linked together to show visually stunning composite images displayed across the entire array of buttons.
Ticket In, Ticket Out (TITO)
By the beginning of the 21st Century, the use of coins was removed from casinos. This removal was for the sake of convenience of both the casino and customers. Both had issues with handling so many coins. Customers because of the difficulties inherent with carrying so much weight, but also gambling delays due to full (or empty) slot machine coin hoppers.
Casinos had issues with coins as well, including customer complaints due to delays caused by a full (or empty) slot machine coin hopper. This inconvenience was a coin logistics issue, which also included higher costs of maintaining a larger vault space and coin processing equipment and services. As casinos became more popular, coins became more difficult for everyone.
As a result, Ticket-In, Ticket-Out technology was pulled into casinos. They are now integral to how slot machines work. This automation is the same technology that was beginning to be seen in Automated Teller Machines (ATMs). Once proven out, this slot machine technology was here to stay like so many others.
Summary of How Slot Machines Work
I’ve discussed the operational components of a slot machine from the point-of-view of a slots player. This explanation of how slot machines work included the various player interface areas on the front of a typical slot machine.
There are additional relatively minor interface areas. These areas include audio speakers, audio volume control (optional), display lights, lever arm, and a hearing aid jack to accommodate those with a hearing disability.
Related Articles from Professor Slots
Other Articles from Professor Slots
- Previous: Where Were Slot Machines Invented Historically?
- Next: Why Do Slot Machines Say Bar on Their Reels?
Have fun, be safe, and make good choices!
By Jon H. Friedl, Jr. Ph.D., President
Jon Friedl, LLC
Players who prefer slot machines to other casino games do not gamble simply for profit, but they also want to have a good time playing. So in order to play the game for longer and benefit from your favorite slot games we recommend you to follow some slots tips that have been developed by experienced players. They will help not to lose at slot machines or online slots of different types and become a real long-term winner regardless the size of the bankroll.
Quick Slot Tips
If you are going to visit a land or online casino to get the rush and thrill of slot machines do not forget to follow some basic slot recommendations. Even if you do not use any special slot machine strategies you can still end up a winner every time you gamble. So, below we explain some do's and don'ts when you play slots.
| DOs | DON'Ts | ||
| 1. | Manage your bankroll and stick to betting limits. | 1. | Try to win lost money back. |
| 2. | Bet Max at progressive slots. | 2. | Play high-roller slots with a small bankroll. |
| 3. | Choose loose slots with high payback percentages. | 3. | Believe in slots myths about cold and hot machines. |
| 4. | Look for extra slot bonuses and casino comps. | 4. | Play traditional slots with minimum features. |
| 5. | Study paytables and choose slots with the highest payouts. | 5. | Play at first slot machine you find at a casino. |
| 6. | Relax and have fun when playing slots. | 6. | Get frustrated or angered when you lose a spin. |
Advanced Slot Tips
How Do Slot Machines Work
Now let's consider all the slots tips in more detail. The following advanced recommendations from the real pros are not obligatory but are considered to be the most effective methods of winning when playing online and offline.
1. Manage your bankroll.
To built up a gaming strategy, the slot player must first of all decide on the bankroll and the size of bets. The smartest tips are to stretch the betting amount, pocket all the winnings, know when to stop and never try to win money back, because you can lose even more.
2. Set up betting limits.
Choose the slot machine according to your bankroll and betting limits. Remember, slots is a gambling game, therefore make sure you treat it wisely and choose a machine according to the amount of money you can afford to wager. Otherwise you risk to reach the 'quit point' very fast.
3. Bet Max at progressive slots.
When playing at the progressive slot machines, bet the maximum amount of coins and bet on all the paylines. It will be a pity if you have the best combination but don't win the jackpot because you haven't Bet Max.
4. Look for extra slot bonuses.
Choose a machine with extra bonuses and special offers such as bonus free spins or bonus rounds. Such games are not only fun but also provide more chances of winning cash.
5. Play only loose machines.
Not all slot machines are based on the same RNG, therefore always look for loose slot machines with the highest payback. Most casinos advertise the slots payback percentages. However, if you cannot figure out the payback statistics remember that as a rule $5 (or higher) slot machines provide the highest paybacks of up to 99%.
How Slot Machines Work Video
6. Practice slots for free.
Before playing for real money, practice a lot in order to know all the game options and learn how to win at slots. You can try our free slots or play slot games in fun mode at online casinos.
7. Check the paytable before the game.
Carefully study the slots paytable before you play to make sure that you know which combinations will win you money and to have an idea of what you are paid out for. Don't rush to play at the first machine you see but look for the slots with the highest payouts.
How Slot Machines Work Inside
8. Don't believe in slots myths.
Do not believe in the widespread slots myths. Don't forget that there is no such thing as a hot or cold machine, therefore pick the one you like and enjoy the game. Remember also that there is no 100% effective system of beating slots and any strategies offered you for buying are useless.
9. Benefit from slots comps.
Most casinos provide casino comps for slot players in the form of free lunches and dinners, hotel rooms, tickets, bonuses, etc. In such way you can save money for playing rather than spend big sums on accommodation and meals.
10. Ask the professionals.
In case you have any questions about the rules, payouts, bonuses or other options, feel free to ask the casino support as they are there for you 24/7.