Post on 22-Feb-2016
description
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