1. Stephen Wolf Kirk Iler Brian Bentz Fuhe Xu

2. Current Schematics Micro, Motor, Keypad 2/2/2011Team 6: Defender2

3. Current Schematics 3.3V Supply 2/2/2011Team 6: Defender3

4. High Voltage Charging 2/2/2011Team 6: Defender4

5. Discharging 2/2/2011Team 6: Defender5

6. Current PCB 2/2/2011Team 6: Defender6

7. Overall Considerations  Two boards (one for HV, one for LV)  Optical Isolation  Some high power traces on comm board (motors)  High voltage trace spacing on power board  Connector issues to motors, coil  Low inductance to coilgun  Thermal management and thermal pad soldering  Availability of headers and extra traces for ICD  Backup solder points for hard to solder parts 2/2/2011Team 6: Defender7

8. Microcontroller Considerations  Very few, microcontroller connections are very simple.  Standard bypass capacitors from data sheet.  Follow design guidelines for USB bus and I2C bus. 2/2/2011Team 6: Defender8

9. Low Voltage Power Supply  3.3V regulator thermal management  Switching 12V power rail  Connector to high power board  Separate 12V grounds 2/2/2011Team 6: Defender9

10. High Voltage Power Supply  Separate AC transformer with connector.  Low amperage but high rms voltage  Low inductance  Protection mechanisms for capacitor bank  Very wide traces 2/2/2011Team 6: Defender10

11. Discharge Circuit  IGBT offboard, screw mount  Low inductance, ESR is critical  Pulse rating for power only  Avoiding reflection and EMI 2/2/2011Team 6: Defender11