1. Power System TEAM SHOCK Team Leader: Matt Uhrine
Hardware Specialist: Dylan Swenglish
Software Specialist: Cody Brooks
Assistant: Kaleb Hoch
TEAM SHOCK

2. Overview Problem Statement Hardware Software Q & A Requirements
Implementation
Software
Initialization
Q & A

3. Problem Statement
Power System: to derive and distribute the required platform voltages from the given 7.2V NimH battery, as well as monitor the voltage of the battery

4. Hardware Requirements
Provide 5V to board
Provide 3.3V for XBee module
Monitor the battery voltage

5. Hardware Implementation
LM2940
Output steady 5V
Input up to 26V
Up to 1A output current
Needs 22 uF cap. on output pin
Needs 1 uF cap on input pin

6. Hardware Implementation
MCP1702
Output steady 3.3V
Input 2.7V V
250mA output current
Use 1uF cap. on both input and output pins

7. Hardware Schematic

8. Battery Monitoring NiMH battery type Use ADC to monitor battery
Voltage divider for ADC

9. Voltage Divider & ADC

10. Software
Initialization
Create variable of type float

11. Software Initialization cont.
Firebird32 RGB LED (included in “macros.h”)
ADC Channel 11 on PTD4

12. Software Implementation Do conversion Convert result and store
Less than or equal to 6.8V?
Activate red LED
Greater than 6.8V?
Activate green LED

13. ADC Working Proof

14. Summary Problem Statement Hardware Software Requirements
Implementation
Software
Initialization

15. References Firebird32-Nano Schematic, Wytec, 2011. Web
MCF51JM128 ColdFire Integrated Microcontroller Reference Manual.
Freescale Semiconductor Inc Web
MCF51JM128 ColdFire Microcontroller Technical Data Sheet
LM2940/LM2940C Voltage Regulator Datasheet
National Semiconductor Corporation Web
MCP1702 Voltage Regulator Datasheet
Microchip Technology Inc Web

16. Questions?