Flight Readiness Review

Flight Readiness ReviewTeam HawaiiLeo Hano Full Scale Low Power

March 13, 2011Motor = K780RLeo HanoFull Scale Low Power

March 20, 2001Motor = K1000WOverview

Drogue42in83.59 ft/secMain144in22.45 ft/sec

Parachutes

Main ChargeDrogue ChargeDual Deployment Avionics test65.2 ft/secReach safe speed at 66.34 inchesrail Exit Velocity

Hula-hoop2 planned features2 memory optionsModel A: 256 Kbytes built on multiple circuit boards to be flown on the Leo Hano rocketModel B: 128 Kbytes built on one circuit board to be flown on an Executioner rocketOne version of the program code for all unitsVariable sample rates between 1 to 6 samples per second

Hula-hoop2 SubsystemsControllerMain serial interfaceDebug port serial interfaceField Input and OutputData storageSensors & Analog to Digital Convertors (ADC)TemperatureAccelerationMagnetic field12 bit ADCPower

Block Diagram V3

ControllerParallax Basic Stamp 2p features:24 pin DIP8 code and/or data segments at 2 Kbytes per segment16 digital Input/Output interfacesDebug and program upload interfaceVoltage regulator at +5 Volts

Data StorageMicro Technology 24LC512-I/P EEPROM features:8 pin DIPcapacity of 65,536 bytes or 64 Kbytes per chipI2C interfaceMemory sizesModel A: 4 chips for 256 KbytesModel B: 2 chips for 128 Kbytes

SensorsTemperature:National Semiconductor LM34 features:3 pin TO-92 caseAnalog OutputConnected to ADC#2

Acceleration:Parallaxs Freescale MMA7455 Accelerometer features:wider than usual 8 pin DIPSPI or I2C interface using SPI 3 axis accelerationchoices of 2g, 4g or 8 g using 8g8 bit or 10 bit resolution using 8 bitDigital OutputData stream8 bits in8 bits out

Sensors: Magnetic FieldCustom built inductorsAnalog Output3 coils will be used, one for each axis (X, Y and Z)Each coil will have its own 4 resistor network that will be connected to ADC#1

Analog to digital convertors: 12 bit ADC #1Micro Technology MCP3208 features16 pin DIP12 bit resolution8 single ended input channels SPI interfaceAdjustable voltage reference (.25 to 5 volts) while keeping the devices power supply at 5 volts. Will be set at 1 voltData stream6 bits in12 bits out

Analog to digital convertors: 12 bit adc #2Micro Technology MCP3202 features8 pin DIP12 bit resolution2 single ended input channelsSPI interfaceData stream4 bits in12 bits outMahalo