Design Constraints

Team 4Mike Niksa, David Freidin

Emily Blount, Ben Moeller

An ability to wirelessly transmit a shot and receive a hit via Infrared

An ability to remotely enable and disable the gun/vest pair

An ability to control game operation using base station keypad

An ability to wirelessly communicate game statistics to base station via RF

An ability to provide user with local display of game information

Minimize device footprint◦ Use serial interfaces, all-in-one devices

Minimize power consumption◦ Battery powered mobile packs

Near real-time wireless communication◦ Score updates as play progresses

Inexpensive major components◦ Multiple copies of gun/vest for game play

Durable Packaging◦ Withstand high-adrenaline game scenarios

dsPIC30F4011 by Microchip-48kb Flash Program Memory-2,048 bytes RAM-30 general purpose I/O pins-40 pins total-Internal oscillator-6x PWM for IR transmission-2x UART, 1x SPI -10-bit A/D converter at 1000ksps for IR receiver-~$4-2.5v to 5.5v range

dsPIC33FJ32GP304 by Microchip-32kb Flash Memory-4,096 bytes RAM-44 pins, 30 general I/O-2xUART, 2xSPI, 1xI2C, 6xPWM-12-bit A/D converter-~$3-3 to 3.6v range

dsPIC30F2023 by Microchip-12kb Flash, 512byte RAM-44pins, 35 general I/O-1xUART, 1xSPI, 1xI2C, 8xPWM-10-bit A/D converter 2000ksps-~$4-3.0 to 5.5v range

MT/LT by Linx Technologies-Requires two stages:Transceiver to CodecCodec to Micro-Parts more expensive (~$22)-One specific frequency-Low current ~14mA send, ~8mA receive-10,000 bps up to 3,000 ft-No external parts required-Detailed many-to-one scenarios in datasheet-Nearly “turnkey” RF solution

CC1110RTK by Texas Instruments-External Oscillator, Capacitors-Nearly any ISM frequency 300-928Mhz-SPI interface controllable-Inexpensive (~$6)-Adjustable data rate (1.2-500kbaud)

MC33696 by Freescale -Detailed integration schematics-SPI interface directly to Micro-Inexpensive (~$6)-~14mA send, ~10mA receive-External crystal oscillator req’d-Six frequency bands