Sound-actuated illumination circuit

Abstract

A circuit (10), for causing a light source (30) to flash in correspondence to the peak amplitudes of an incoming sound signal, e.g. music (12), comprises an audio transducer (14), a band-pass amplifier (16), a peak detector section (18), and a filter (20) connected to a monostable circuit (24) via a capacitor (22). The light source (30) comprises one or more surface mount LED devices, and can be used to illuminate the contents of a container, e.g. a drinks bottle.

Description

Background technique [0001] Circuits for actuating strobe lights in time with music in nightclubs are well known. Such circuits are part of relatively large sets of stationary equipment. WO2004 / 110892 discloses a light source connected to a container, such as a beverage bottle, and arranged to be activated by sound waves from a loudspeaker in a nightclub. Certain sound waves, such as the bass output, are programmed to act as triggers for the light source to flash in time with the music. [0002] Existing circuits are characterized in that they are only capable of responding to a relatively narrow range of sound levels, typically the 15 dB range. For stationary devices, this is not a problem, but for moving arrangements, existing circuits cannot easily change their response when the environment changes from very noisy to relatively quiet (and vice versa). Contents of the invention [0003] Aspects of the present invention seek to overcome, or at least alleviate, the above-...

AI Technical Summary

Problems solved by technology

For stationary equipment, this is not a problem, but for moving arrangements of items, existing circuits cannot easily change their response when the environment changes from very noisy to relatively quiet (or vice versa)

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