Team Members: Ruichen Zhao Xhoua Lor Jen-Yuan Hsiao John Marion

 Free, recycled from MilesTag taggers.  Four pin control.  Reset and Enable Pins.

 Global Positioning System  MN5010HS  SiRF Binary Protocol  Standalone chip that streams 32bit XYZ positional data.

GPS Chip I/O Ports

 GPS Micro-Mini From Sparkfun. Note have chip as well for second revision based on sparkfun model. ○ Prebuilt version is more expensive.  Connector Ports Connect and disconnect from main board. ○ Plug and Play (kind of).  Antenna

 Radio Frequency Communication.  The radio front end uses GFSK modulation.  The channel occupies a bandwidth of less than 1MHz at 250kbps  The ANT1 and ANT2 output pins provide a balanced RF output to the antenna Zo = 15Ω+j88Ω

RF transceiver I/O Ports

 Frequency: GHz  Gain: 3.2 dBi  Impedance: 50ohm  VSWR < 1.9  Polarization: Vertical  Radiation: Omni

 Transceiver nRF24L01+ Module with Chip Antenna. From Sparkfun.  Connector Ports Connect and disconnect from main board. ○ Plug and Play (kind of).  Resistors/Capacitors/Inductors Biasing and Impedance Matching.  Antenna Chip antenna does not work well in use.

 PWM Infrared light  Encodes a bit stream of data  Added 455kHz communication

I/O Port I/O Port 56kHz Receiver 38kHz Receiver 455kHz Receiver

 Using PWM (Pulse Width Modulation)  We output a fc=40, 56 or 455 kHz square wave of the IR light wave(950 nm = 316THz).  24 periods of 1/fc for a zero, 48 periods for a 1 and a 96 periods for a header.  Each pulse is separated by 24 periods of off time. From Vishay Documentation

This is an example of a what is actually propagated through the air. 5 periods of pulsed IR.

 TSOP sensor has built in demodulator. All we see at the processor is a PWM signal that represents a bit stream. Inverted signal From Vishay Documentation

 Example Signal from MilesTag website.  We are using this scheme scaled to our carrier frequencies.  At 455kHz we can fit in over ten times the data in the same time.

 Here is an example of what we generate Binary 01 ○ Transmitted ○ Received

From Vishay Documentation

 Isolates Microcontroller from sensors.  For Tricolor LEDs and Sensors.  8 Darlington Pairs Per Package.  500mA per Darlington Pair. Plenty of leeway Sensors max rating 200mA. LEDs max on a pair would be 80mA.

From TI Documentation

Single internal Circuit With on/off modeled + Driven System model

 9 Selection bits for color of each sensor area. Red Green Blue (Any Combo!) Head, Front and Back can light differently. ○ Select with switches or Jumpers.  3 selection bits for selection of which TSOP to use. 455kHz/56kHz/38kHz.  3 inputs from sensors. Head, Front or Back. ○ Select with switches or Jumpers Sensors for each section in parallel.

 TSOPs 38kHz, 56kHz and 455kHz sensors. 1 each.  Tri-Color LED Common Anode (changed to work with Driver).  Decoupling Capacitor Stabilize Power to TSOP.  Resistors Current limiting for Sensors and LEDs.  Ports 1 in, 1 out in parallel.

 TSAL6100 Highly directional IR LED  TSAL driver MOSFET (optional but likely)  Muzzle Flash Standard white LED.  Resistors Current limiting for the LED.  Cable Run to main board

 Display (LCD) 8X2 Char. LCD or one available from lab ○ Serial Interface ○ Need driver circuit.  Sound Peizo Buzzer ISD Sound Chip  Controls (Keypad/Buttons) ‏ Directional Buttons. Trigger Reload Key switch  Team color selecting LEDs Tell a player which sensors are active Tell players which team a player is aligned with. Other game specific options.

 Working GPS communication  Sensors communicate correctly with microcontroller  Microcontroller interrupts correctly  Revision 1 of PCB completed and integrated

 Final revision of PCB is complete  Working RF link  All basic functionalities complete  Working on documentation  Possibly working on audio feedback If time allows

 Two working prototypes Communicate with each other Has a game play function set up  Completed documentation User Manual Technical Manual

 John: Protocols Documentation Sensor boards ○ Design & Etching  Jen-Yuan: Schematics Board Layout GPS  TJ: RF interface Hardware construction o Soldering o Wiring  Richard: Coding Protocol Practicality