1. 1 PRELIMINARY PCB LAYOUT Autonomous Targeting Vehicle (ATV) Daniel Barrett Sebastian Hening Sandunmalee Abeyratne Anthony Myers

2. 2 Updated Block Diagram

3. 3 Overall Layout 8” 6”

4. 4 Overall Layout Micro 5V Supply H-bridge/Motor Battery Recharge Atom Servos Accelerometer Sonic/IR 3.3V Supply not here Micro Wheel Encoder

5. 5 Keep functional blocks together –Reduce trace length Analog signals separate from motors and digital circuitry Reduce clutter –Microcontrollers in the center –Connectors on the outer edge Traces –Power and Ground: 50 mils, Logic Signals: 25 mils –Short and wide; 45-degree angle turns Mounting holes General Considerations

6. 6 9S12C32 – with oscillator Placed at the center – Shortest path to peripherals – Orientation Decoupling capacitors placed close by between Vcc and GND H-bridge/motors – Shottky diodes to protect micro from EMF – Optical isolators Microcontroller Considerations

7. 7 12V NiMH rechargeable battery – Regulated 5V, 3.3V – 12V motors, Atom board – Battery Charging circuitry Single point power and ground (50 mils wide) 5V Supply – Adjustable regulator, several 0.1uF and 1.0uF bypass capacitors – Bulk capacitor at output terminal Decoupling capacitors Power Supply Considerations

8. 8 Questions?