Transcript Chris report

Current Works
• Soldered pins onto IMU, XBee breakout board,
and 3.3V regulator
• Successfully powered XBee off of 2 AA
batteries using the voltage regulator
• Configured and tested serial communication
between 2 XBees
Current Test Setup
XBee A/D Conversion problems
• Only 4 pins for input- going to need more because IMU has
5 outputs
– Could be solved by using a MUX
• Can only read voltages between 0 volts and 1.2 voltsvoltages can be scaled down using resistors but will lose
some precision
– Future testing needed with IMU to determine how significant
this problem is
• XBee freezes up whenever the required A/D firmware is
downloaded
• Possible solution- use Microprocessor to perform A/D
conversion and send to XBee using serial communication
– Microchip offers free samples of their microprocessors and
there are small chips specializing in A/D conversions
What’s Next?
• Begin testing accelerometer and gyroscope
output on IMU with the assistance of
MobileStudio Board
– Determine output range
• If Xbee conversion will be precise relative to
results form IMU testing, continue researching
and programming Xbee to perform A/D
conversions
• Research other A/D conversion
chips/microprocessors