DOODLE DRIVE

Presenter: Edward Kidarsa

Team 6

TabletControlled

Vehicle

PCB LAYOUT – 7.25 X 5.45 IN

DESIGN CONSIDERATIONS - PERIPHERALS GPS far away from everything

Especially active circuits such as regulators Bluetooth away from power supply

No traces / ground plane / vias allowed under antenna Antenna end protrude 5mm beyond any enclosure

Traces 0.016 in used for most traces ( including power and ground for now )

Routing 45 degrees routings were used as much as possible

Current problem: Vias are all touching

DESIGN CONSIDERATIONS - MICRO Center of PCB to be accessible to everything else 26 pin header on each side so all 100 pins are accessible Bypass capacitors placed next to micro before headers External oscillator used

Located near the microcontroller after header Routing

Pins used mainly from one side of the micro-controller, thus needed long traces and many vias were used to connect to all interfaces

Traces Due to the small size of the pins, only 0.01 in traces were able to be used Traces “under” micro to connect power and ground pins of micro together

MICROCONTROLLER

DESIGN CONSIDERATIONS - POWER Power Circuit:

2 Motors, H-Bridge, Battery Recharge Circuit, 2 Voltage Regulators

Power circuit located near edge of PCB away from transmission peripherals

Placed near each other Power circuits may have current feedback / current

spikes and may need wider traces Unsure of trace widths for 3 different voltages

Trace under H-Bridge

H-BRIDGE + FUEL GAUGE

MOTORS

VOLTAGE REGULATORS

RECHARGABLE CHIP CIRCUIT

QUESTIONS?

GPS + BLUETOOTH

COMPASS + SERVO + ULTRASONIC SENSOR + OPTICAL ENCODER + OSCILLATOR