Patent ID: 9697723
Date: 2017-07-04
CPC Classifications: G08B

Claim:
1. An illuminated doorbell chime comprising: a main power supply; one or more LED lights; a chime having a chime coil; a circuit having a power supply unit, an LED driver and a chime driver, wherein said power supply unit is connected to said one or more LED lights and said chime coil, said LED driver is connected to said one or more LED lights, and said chime driver is connected to said chime coil; a touch pad doorbell sensor having a touch surface defined by a housing of an outdoor portion of said doorbell chime; said touch pad doorbell sensor further including an RC circuit which includes a capacitor and a resistor connected in parallel to an earth ground, with said touch surface connected to said capacitor and said resistor of said RC circuit such that when said touch surface is touched by a person, the person defines a capacitance connecting between said touch surface and the earth ground in parallel with said capacitor and said resistor; and a microprocessor programmed for discriminating against touches to said touch surface caused by moisture and small animals, as opposed to a human touch, wherein said microprocessor is connected to said RC circuit to both determine voltage on said RC circuit and to selectively apply a voltage to said RC circuit, and said microprocessor compares a measured relaxation frequency of said RC circuit to a threshold relaxation frequency for determining when the human touch has occurred.