Capstone Design Document (pdf) - Capstone Experience

• 3Mo Pros: Noneo Cons: NoneMolex connectors were chosen because it is already in use by Painless Performance.This will added continuity in products and ease in use.Self-contained and stand-alone unit:• Microchip 24H MCU Familyo Pros: 16 bit, 85 I/O lines, 2 ADCs, RS-232, I 2 C, Inexpensiveo Cons: Memory• Microchip dsPic33 DSC Familyo Pros: 16 bit, 85 I/O lines, 2 ADCs, RS-232, I 2 C, Inexpensiveo Cons: Memory• Freescale Coldfire 523X Familyo Pros: 32 bit, I/O lines, RS-232, I 2 C, Enhanced Time Processing Unit (eTPU),Memoryo Cons: No ADCs, ExpensiveThe Microchip Pic 24H MCU family was chosen because it meets all the functionalrequirements while being inexpensive. This family offers many modules that are needed fordevelopment of the Striker Force while not adding additional cost of a high performancemicrocontroller.Handheld Enclosure Size and Weight:• Plastico Pros: Inexpensive, Thickness, Lightweighto Cons: Durability• National Electrical Manufacturers Association (NEMA)o Pros: Durability, Lightweighto Cons: Expensive• Aluminumo Pros: Durability, Lightweighto Cons: ExpensiveThe plastic housing was chosen because of its physical characteristics as well as cost. Itis durable enough to withstand heavy usage as well as being lightweight and inexpensive.Mountable:• Suction Cup Mounto Pros: In use by Painless Performance, Universal, Inexpensiveo Cons: AestheticsPage 7Capstone Design Document February 1, 2007