Sound actuated light switch

Details Sound actuated light switch Sound actuated light switch

1981-06-16

1983-10-04

Yusko, Donald J.

Communications, electrical: acoustic wave systems and devices

Selective

34082572, 340565, 307117, H01H 3600, H01H 3524, G08B 1322, H04Q 118

Patent

active

044083084

ABSTRACT:
A sound actuated switch including a microphone coupled via an audio amplifier to a reset circuit. When a sound of sufficient intensity is received by the microphone a reset signal is supplied to the counter portion of an oscillator and counter circuit. The counter then begins counting oscillations and produces an "on" control signal until a predetermined count is reached, at which time an "off" control signal is produced. The control signal is supplied to the gate of a switching triac in a switch circuit. The presence of the on control signal causes the switching triac to electrically connect an AC power source to a load, typically a light. A simple, high efficiency DC power supply is also disclosed.

REFERENCES:
patent: 3893081 (1975-07-01), Hopkins
patent: 3934156 (1976-01-01), Galemmo et al.
patent: 3949366 (1976-04-01), Spillar et al.
patent: 3979601 (1976-09-01), Franklin
patent: 4099168 (1978-07-01), Kedjierski et al.
patent: 4103294 (1978-07-01), Stettner et al.
patent: 4159473 (1979-06-01), Senk
patent: 4198574 (1980-04-01), Price et al.
patent: 4344071 (1982-08-01), Allen

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