Swish Sleeve PCB Layout Design Narrative Stephen MacNeil, Michael Kobit, Sriharsh Achukola, Augustus Hong

Project Overview We would like to design and implement a shooting sleeve made from compression material that basketball players or pitchers could wear to track their motion, without the use of cameras. This prevents current occlusion issues inherent in optical motion capture. The sleeve can be extended to other sports as well and beyond the scope of this class could be extended to an entire suit which could monitor sports performance in athletes.

Block Diagram

Overall PCB Design Consideration Microcontroller Decoupling capacitors required for power pins ceramic type capacitors for reducing high frequency noise Separate the circuit into 4 parts: Microcontroller Transmitting device(XBee) Analog circuits(switch mode voltage regulator) Digital curcuits(LCD, IMU inputs)

Micro Considerations Passive Components Decoupling Capacitors close to power and ground. No external clock oscillator circuit needed (Using Internal CLK) Routing Paced in center to provide shortest path to peripherals. Connects to components from every side. Headers/Jumpers ICSP for on-board programming 3 IMUs that require 6 pins LCD and battery

Power Supply Considerations Multiple Voltages 3.7V battery supply 3.3V regulated for components 5V regulated for LCD display Layout Switching Regulator (3.7V stepped down to 3.3V) Charge Pump (3.3V stepped up to 5V) Parts LM V, 150mA needed for design) 5V, 3.5mA needed for design)

Schematic (Switch Regulator & Charge Pump)

Schematic ( Micro, Xbee and IMU headers)

PCB Layout

Questions?