Fiber optic controller with an interface having an emitting diode and a photodetector
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United States of America Patent
Stats
-
Apr 25, 1995
Grant Date -
N/A
app pub date -
Jan 21, 1993
filing date -
Jan 21, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fiber optic controller comprises a keyboard having a plurality of keys. Each key has a transmitting fiber and a receiving fiber wired therein. Light is provided to the transmitting fiber by a light emitting diode and travels to the key and, thence, to the receiving fiber by way of a reflective surface on the key which reflects the light when the key is in a depressed or 'on' position. An electronic controller is controlled by signals from photo transistors which signals are initiated when light is transmitted by the receiving fiber to the photo transistor. The electronic controller, in turn, activates a power circuit which powers various of the operating components of a spa or hot tub.
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