Sound responsive lighting device with VCO driven indexing

Details Sound responsive lighting device with VCO driven indexing Sound responsive lighting device with VCO driven indexing

1981-12-18

1984-04-03

Perkey, William B.

Music

Accessories

Producing color or light effects

34081511, A63J 1700

Patent

active

044400594

ABSTRACT:
A sound responsive variable visual display (light organ) including an array 25 of light-emitting diodes arranged along a pair of orthogonal axes. A pair of counters (58, 60) having decoded outputs (30, 35) forming common connection points of the anodes and cathodes, each connection point corresponding to one point on one of the orthogonal axes, to activate one diode at a time. The counters are driven by independent voltage controlled oscillators (49, 50) with independent quiescent frequency adjustments (51, 52). The control voltage (38) is an electrical analog of an audio sound field in which the device is placed as detected by a microphone (12). Also shown are alternate arrangements for reversing the direction of indexing of the elements in the array along the axes, one to reverse counter direction in response to reaching predetermined high and low counts (71) and an alternate apparatus (48, 79) including a voltage controlled oscillator (48) for switching between an up and down counting direction.

REFERENCES:
patent: 4161018 (1979-07-01), Briggs et al.
patent: 4164823 (1979-08-01), Marsico
patent: 4215277 (1980-07-01), Weiner et al.
patent: 4254451 (1981-03-01), Cochran, Jr.
patent: 4262338 (1981-04-01), Gaudio, Jr.
patent: 4265159 (1981-05-01), Liebmann et al.
patent: 4267561 (1981-05-01), Karpinsky et al.
patent: 4346640 (1982-08-01), Zeno et al.

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