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

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

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

Battery Monitor PCB eV-TEK

Battery Monitor PCB eV-TEK

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

Main Board - Top eV-TEK

Main Board - Bottom eV-TEK

Main Board - Bottom eV-TEK

Main Board - Bottom eV-TEK