ECE 477 Group 11 RevGeo Multipurpose Puzzle Box Josh Marchi, Jeff King, Paul Rosenberger, Dan Chambers

Overview “Reverse Geocache” Box Locked box that will only open after one or more pre- determined GPS locations have been visited Directs user to next location by GPS coordinates or text displayed on LCD, or by an LED compass Route stored on microSD card located inside the box, able to be reprogrammed by PC RFID “master key” to allow access to box without finishing puzzle

PSSCs An ability to obtain and decode global positioning data in order to verify if current location matches pre- determined desired location. An ability to utilize accelerometer and magnetometer data to determine a compass heading with tilt compensation. An ability to access and interpret files located on a microSD card. An ability to display information to the user via an LCD display. An ability to identify an RFID tag using an RFID reader.

Hardware: Battery Management MAX1555 Dual USB/AC Adapter Battery Charger Output pin to show power is present

Hardware: Battery Management TI TPS54331 3.3V Regulator Microcontroller GPS microSD Compass TI TPS61175 5V Regulator LCD RFID Servo

Hardware: Microcontroller PIC24FJ256GA106 Operating Voltage: 3.3V 16 Bit Architecture 16 MIPS CPU speed 256KB Flash 16KB RAM 4 UART Modules 3 I2C Modules 3 SPI Modules 64 Total Pins

Hardware: GPS Trimble Copernicus II (w/ SparkFun BoB) UART (3.3V, matches micro) Operating Voltage: 2.7V – 3.3V Various pull-up and pull-down resistors

Hardware: Digital Compass LSM303DLH (w/ SparkFun BoB) I2C Serial Out (3.3V, matches micro) 3.3Vcc Input Built-in Voltage Regulators: 1.8V (Digital Supply) 2.5V - 3.3V (Analog Supply)

Hardware: RFID ID-12 Operating Voltage: 5V TTL Serial Out (5V) Micro has 5.5V tolerant digital inputs

Draft Schematic… GPS Micro Speaker RFID Compass

Questions?