DOODLE DRIVE Presenter: Edward Kidarsa Team 6 Tablet Controlled 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  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