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DESIGN REQUIREMENTS



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2 DESIGN REQUIREMENTS Playing a musical instrument is an enjoyable hobby shared by many people worldwide Light Leader promotes the widespread learning of guitar through its ease attractiveness and affordability The device uses light emitting diodes LEDs to illuminate the points on a guitar neck where players should place their fingers The LEDs are controlled through included computer software that scrolls guitar tablature on the screen Users can control the tempo of the scrolling to match their playing level The software also plays audio to simulate the rhythm of a metronome and the musical chords associated with the tablature In order to develop this effective guitar aid specific technical and practical design constraints must be followed 2 1 Technical Design Constraints Table 1 specifies five technical design constraints These constraints provide Light Leader the capability to be portable and to communicate more efficiently between the central processing unit CPU to the straps Table 1 Technical design constraints for Light Leader Name Visibility Weight Height Current Draw Software Size Delay 2 1 1 Description The LEDs draw 5mA to insure visibility from a distance of 3ft The hardware on the guitar neck weighs less than one pound The strap between the neck and the strings has a height of less than 2mm The entire device requires less than 50mA The software included uses less than 50Mb of hard disk The delay between the software sending a signal and the hardware converting the signal and illuminating the LEDs is less than 1ms Visibility Visibility refers to the ease in which the light of the LEDs can be seen during regular use of the product To insure the visibility is adequate for viewing distances less than 3 feet the LEDs each draw 5mA of current when lit 2 1 2 Weight Light Leader must be of sufficient weight such that it does not interfere with normal playing of the guitar by making the guitar neck too heavy The heaviest component of the device is the cloth on



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