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below is from the site in the video, wow http://www.bouwvoorbeelden.nl/home_eng.htm (http://www.bouwvoorbeelden.nl/home_eng.htm)

This Casino Slot Machine (Fruit Machine) accepts real credits. The display shows how many credits you have gathered. One spin costs 10 credits. Press the Yellow Button and it starts the machine rolling. Now just wait until it stops. The Red Buttons can hold the selected reels for you, for one turn. A winning fruit combination will instantly be paid back to the player, not in credits but in cash!. The returned money (or Poker Chips) is dropped in the basket below.

The player can win up to 200 Credits according to the table at the right. Remember, it can be real money, so be careful!

This slot machine contains two Lego Mindstorms NXT modules, communicating through Bluetooth channels #0 and #1. NXT-2 is handling all player activities. It has 3 motors for the reels and 4 touch sensors (RCX type) for the player buttons. NXT-1 is the master of the credits, the cashier. It accepts the coins or chips, keeps them in the safe, passes the credit value of the coins or chips to NXT-2 (channel #0) and immediately starts paying the Price Money when a WINNING COMBINATION has emerged. It has 3 motors for handling the cash and light sensors for detecting the coins or chips.

This NXT project features two types of “My Block” display routines for showing numbers in easy readable LARGE DIGIT format!

At the left: the players display showing your Credits and the Reel Hold status. At the right: the hidden cashier status information, showing the actual cash, the real profit (of the owner of the Slot Machine, not the player) and more!

The display routines requires home made RIC files, to be downloaded from this website. Special thanks to Andreas Dreier for his perfect nxtRICedit utility!
Yes
Requires unofficial parts in your LDraw library
Opened Front
Opened Rear
The MOVIE
Guide in PDF
NXT-2 Software
Large Digit SW
RIC Files
Fruit Images
Yes
CASH UNIT
inside
NXT Slot Machine

The Slot Machines comes in two versions. The version type depends on the inside Cash Handling Module.

The Cash Unit handles Euro Coins: You might change the sizing of the cash containers (two square shafts) and the dispenser opening if you want to use an alternate currency. The building instructions are based on the Euro Coin sizes. On request I programmed a NXT-1 SW version to handle $10c and $25c coins!

Building tip: Use a rubber band to hold the coin shafts against the “coin shaker”.

Yes
Requires unofficial parts in your LDraw library
Guide in PDF
NXT-1 Euro SW
NXT-1 USD SW
Yes
POKER CHIP UNIT
inside
NXT Slot Machine

The second version Slot Machine is based on this Chip Handling Unit. It is based on common Poker Chips of 11,5 grams and 40mm in diameter. The software is able to handle green and yellow chips. You could also take blue and white for example, but be aware that the red light from the NXT Light Sensor is not so well able to detect the difference between green and blue or the difference between red and yellow for example.

The Chip inlet at the front of the Slot Machine is of course a bit larger than in the Euro Coin version, but the machine is very much the same. See the MLCad file or Guide in PDF format for the construction differences.

Building tip: Use a small rubber band to keep the Chip-Pay-Out-Detection pins (RCX Rotation Sensor) close to the Chip Dispense openings.

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