Table 1.
Technical specifications and other characteristics for the different versions of the system.
| First Version | Second Version | Third Version | |
|---|---|---|---|
| Voltage | 5 V | 5 V | 3.3 V |
| Batteries | 6 AA 25,000 mA 1.2 V (x9 batteries) | 2000 mAh polymer lithium rechargeable battery | 1000 mAh polymer lithium rechargeable battery |
| Accelerometer | 3 axis ± 2 g | 3 axis ± 3g | 3 axis ± 16 g |
| Gyroscope | - | - | ±2000 °/sec (dps) |
| Infrared proximity sensor | 10–80 cm | 4–40 cm | 3–40 cm |
| RFID | - | 125 kHz read frequency EM4001 64-bit RFID tag compatible | (optional) 13.56 MHz read frequency. MFC and PCD mode for ISO/IEC14443-3 Type B and ISO/IEC14443-4 Type B cards |
| Wireless protocol | XBee/WiFi | XBee/WiFi | Bluetooth 4.1 LE |
| Full duplex communication | no | no | yes |
| Frame rate | 10 fps | 15 fps | 30 fps |
| Delay (approx.) | 2000 ms | 1500 ms | 100 ms |
| Game programming language | pygame | pygame | cocos2dx/Unity |
| Requires server | yes | yes | no |
| Supported handheld devices | Nokia N850 | Nokia N850 | Android and IOs SmartPhone |
| Waterproof | no | no | IP55 |
| Impact resistant | no | no | yes |
| Adaptable to all elements in the playground | no (four different designs) | yes | yes |
| Ergonomic case design | no | no | yes |
| Sound | no | yes (only the sensor) | yes (sensor and videogames) |
| Complexity of animations | low | medium | high |
| Video games | Puzzle City | Puzzle City (improved) | Space Kids, Puzzle City 2, Pac-Man, Pong, Moskis, HybridEDU |