1. Preliminary PCB Design
eV-TEK
Andrew Phillips
Ben Laskowski
Rob Swanson
Shannon Abrell
Preliminary PCB Design

2. Overview Two PCB layouts required
eV-TEK
Two PCB layouts required
Battery monitor PCB
Main controller PCB
Battery PCB measures voltage and current for each battery pack
Need 2 of these, one for each pack
Data sent to main PCB over serial link
Main PCB collects, analyzes, logs, and transmits data

3. eV-TEK Battery Monitor PCB 2 x 2.075 inches
Components generally placed where most convenient
Digital and analog circuits separated
Relatively large traces used
≥12 mils for signals
≥24 mils for IC power connections
≥30mils for power buses
Decoupling capacitors near each power pin
Most extra microcontroller pins padded out
Linear regulator for power supply

4. Battery Monitor PCB
eV-TEK

5. Battery Monitor PCB
eV-TEK

6. eV-TEK Main Board PCB 3 inches by 4 inches
Onboard power supply regulates 12v to 5v and 3.3v
Power supply is in its own area
Board is mostly low-power digital components
Contains driver interface components onboard
All microcontroller pins padded out
Components placed to minimize trace lengths and via requirements
Decoupling caps placed near each power pin
Power traces 50 mils or greater

7. Main Board - Top
eV-TEK

8. Main Board - Bottom
eV-TEK

9. Main Board - Bottom
eV-TEK

10. Main Board - Bottom
eV-TEK