초록 ▼

A reduced power consumption low battery indicator comprising in the preferred embodiment a transducer driver which drives a transducer to provide an audible alert. A microprocessor is used to generate a squarewave signal to power the transducer driver whenever the battery is depleted to a first pred

A reduced power consumption low battery indicator comprising in the preferred embodiment a transducer driver which drives a transducer to provide an audible alert. A microprocessor is used to generate a squarewave signal to power the transducer driver whenever the battery is depleted to a first predetermined level. A first low battery sensor is used to determine when the battery is depleted to the first predetermined level and generates a signal which is directed to the microprocessor to commence generation of the signal to drive the transducer driver. A second low battery sensor is used to determine when the battery is depleted to a second predetermined level and generates an output signal which is directed to the transducer driver which then drives the transducer at a lower power consumption rate.

대표청구항 ▼

A depleted battery indicator for a device being powered by a battery, said battery indicator comprising: audio annunciator means for providing an audible alert; circuit means, connected to said annunciator means, for determining when said battery has been depleted to a first predetermined voltage an

A depleted battery indicator for a device being powered by a battery, said battery indicator comprising: audio annunciator means for providing an audible alert; circuit means, connected to said annunciator means, for determining when said battery has been depleted to a first predetermined voltage and generating a first signal to activate said annunciator means whereby said alert is provided at a first power level and for determining when said battery has been depleted to a second predetermined voltage and generating a second signal to further activate said annunciator means whereby said alert is provided at a second power level wherein said second power level is less than said first power level, thereby prolonging battery life.