Abstract: Electrical connection coupling apparatuses are provided that can include a male component encompassing an end of a first electrical conduit; a female component encompassing an end of a second electrical conduit, wherein when coupled the components define apposing parabolas with the wide ends of the parabolas opposing one another, and each parabola tapering to the electrical conduit. Electrical connection coupling apparatuses can include a recess extending along a lateral portion of the component; and a clasping assembly comprising a member having an end pivotably engaged within the recess, the member extending along its length to a flange. Receptacle adapters are provided that can include a body extending from a male coupling end to a female coupling end, the body defining sidewalls extending between the ends; a flange configured to couple the body to an electrical outlet; and a recess extending from the female coupling end along the body.

Abstract: A self-contained motion sensitive audio module includes a sensor circuit coupled to a pyroelectric infrared sensor with two sensing elements configured for reliably sensing passersby. The module also includes a power supply, a timing circuit, an audio circuit, a speaker and optionally an LED. The sensor circuit produces an amplified trigger signal when a passerby is sensed. The sensor circuit includes an amplifier to amplify the trigger signal. The timing circuit produces an activation signal upon receiving a trigger signal from the sensor circuit. In playback mode, the audio circuit produces an audible sign message output upon receiving an activation signal from the timing circuit. The module may be attached to the back side of a sign with apertures for receiving the sensor, speaker and optionally an LED.

Abstract: A self-contained motion sensitive audio module includes a sensor circuit coupled to a pyroelectric infrared sensor with two sensing elements configured for reliably sensing passersby. The module also includes a power supply, a timing circuit, an audio circuit, a speaker and optionally an LED. The sensor circuit produces an amplified trigger signal when a passerby is sensed. The sensor circuit includes an amplifier to amplify the trigger signal. The timing circuit produces an activation signal upon receiving a trigger signal from the sensor circuit. In playback mode, the audio circuit produces an audible sign message output upon receiving an activation signal from the timing circuit. The module may be attached to the back side of a sign with apertures for receiving the sensor, speaker and optionally an LED.