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The tennis
computer is a small device a tennis player wears on his wrist
to collect match statistics during play. It is about the size
of a wristwatch, has five buttons for data input, and an array
of LED lamps to display the score. After play he uses a cable
to connect the tennis computer to a PC and downloads the match
statistics. There is an application on the PC that stores, displays
and analyzes this data.
There were
several important requirements that had to be met for the project
to be successful. For starters, the device had to be extremely
low cost, lightweight and durable. Five buttons are required for
data entry and a low cost data display system was needed.
The Tennis
Computer is battery operated with excellent battery life. Battery
life should be at least three months under normal operation (defined
as three matches per week). It needed to have nonvolatile data
storage for retaining match statistics when the device was not
in use. The device is sealed and water-resistant, and provides
an RS-232 link to allow data dumps to a PC.
Block
Diagram
Greg Fisher
California, USA
skinnyd@onebox.com
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