Project description - RFID DOMINATOR:
DOMINATOR is a device - stopwatch for sports such as Airsoft, Paintball. The stopwatch uses an Arduino control microcontroller (Arduino Uno / Nano) or a separate chip (Atmel) AtMega328P, which controls the entire system logic. The stopwatch includes an LCD character display measuring 16x2 (16 characters x 2 lines), or 20x4, on which the times of individual teams are displayed. There are 2 teams in the game - RED team and GRE team that play against each other and occupy the imaginary point that is formed by this device - DOMINATOR.
At the beginning of the game, the display shows the times 00 hours, 00 minutes, 00 seconds for RED team, GRE team. Each member of the team is equipped with a card, bracelet or key fob, which communicates on the frequency 13.56MHz with an RFID reader, if it is within its range. Keychains and bracelets can be color-coded (green, red according to team and function...), which allows them to be distributed more efficiently to players, but also their archiving and storage.
If the RED team occupies a point, the team player attaches his card to the reader, thus occupying the point. This action triggers a buzzer that announces a change in the point. Then the RED team's LED at this station will light up and the display will start adding time for that team. If a GRE team occupies a point and a member of that team attaches the card to the reader, a buzzer sounds again, that team's LED lights up, RED's team time is paused, and team time counts. GRE, which occupied the point. If the card / key fob is attached by the organizer (referee), both times are paused until one of the teams inserts the card.
This type of card is thus suitable for starting a break, but can also be used at the end of the game, when it is necessary to stop time to evaluate the game. There is still a fourth type of card in DOMINATOR - eraser, which pauses both times and resets to initial values as after starting the DOMINATOR stopwatch. Used to restart the game, initialize a new game. The project is suitable for Airsoft events, sports facilities, or Airsoft teams, which can build the equipment.
The advantage of the DOMINATOR system is that the system can be cloned and create X points with the same configuration via machine code, which can be fought independently in the game, while the RFID cards will work fully on all DOMINATOR devices. The system is tested, functional, easy to maintain. The NXP RC522 reader works at a frequency of 13.56MHz, registers RFID tags at approx. 3 centimeters (almost physical contact with the reader is required), compatible ISO / IEC 14443-A tag format. The given tag standard also includes ISIC, bus cards, which function as NFC cards and can communicate their physical address - UID to a reader within range.
Hardware for the project - RFID DOMINATOR:- Arduino Uno / Nano
- LCD display ´20x4
- I2C converter for display
- RFID reader NXP RC522
- RFID cards, wristbands compatible with ISO/IEC 14443-A
- Buzzer
- 2x LED indicator for active team
The RF5 reader RC522 communicates with the Arduino via the SPI bus. It reads the UID (identifier) of RFID cards in range, forwards this identifier to Arduino, which executes the program logic. The reader responds to the distance of the chip about 3 cm from the antenna. Arduino compares the read card address in a multi-condition, applies digital states to diodes, runs a universal counter every 100ms (counts in tenths of a second), controls the counting of both times. The time is sent via the I2C bus to the 20x4 character display, where it is plotted. The display takes up to 30ms at an I2C bus speed of 100 kHz - Standard speed.
Maximum time range that can be listed on the system: 99 hours, 59 minutes, and 59 seconds Consumption: approx. 110mAh with 5V power supply. Convenient to power via power bank, charger from a phone with USB output.
RFID DOMINATOR project is suitable for:Teams, clubs, sports facilities, events. If RFID cards, bracelets or key fobs are color-coded, they are very easy and universally distributed to players. Tabs are easy to use for all ages. The chip is protected in a plastic case, it does not mind dirt, water... Suitable for DOMINATION game modes, Capture Point (more than one DOMINATOR can be used in the game), a game mode that has a balanced number of players. The use is mainly for sports Airsoft, Paintball, Nerf Wars.
The PCB design for the RFID Domination Timer (1.0) project is available in .lppz format (LibrePCB). The archive can be uploaded to the website of the German company AISLER, which can produce a printed circuit board by machine, including drilling and tapping holes. The standard production price is 23 € for three pieces, which is the minimum order (7 € / piece). The price is also with postage and low priority with delivery within 3 weeks of ordering.
It is recommended to use a pin headers on the PCB, as it is possible to replace the hardware in the event of a fault without the need for soldering. Spacers can also be replaced by threaded rods. The box for the project is not designed. The PCB can be mounted in a box or on the wall through 4 mounting holes in the corners of the PCB. Production can also be realized at Chinese manufacturers - JLCPCB / PCBWAY.
You can read more about project at: https://martinius96.github.io/Airsoft-DOMINATOR-RFID/en/index.html
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