| 摘要 |
An adaptive, battery-operated sound actuate illumination device includes a housing of a durable material having an interior chamber and electronic components located within the chamber. The housing utilizes existing door lock hardware to secure the device to the door for unobtrusive, mechanical installation. The electrical components include a light emitting device positioned within the housing adjacent to an area to be illuminated, a sound receiving sensor adapted to respond to a noise by the user and energize the light emitting device, an optical sensor adapted to determine the existence of ambient light and thereby preclude the illumination of the light device when light is detected, an integrated circuit to receive the inputs of the microphone and optical sensor and to provide an output to energize the light emitting device, a time sensing electrical component adjacent to the input end of the integrated circuit to time out the activation of the light emitting diode after a predetermined period of time and a power source to power the microphone, optical sensor, timing circuit, and light emitting diode.
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