A capacitance measurement circuit for determining a sense current of a capacitive sensor with a sense electrode and a guard electrode. The measurement circuit includes a periodic signal voltage source, a sense current measurement circuit configured for determining the sense current with reference to a reference voltage, and at least one remotely controllable switch member. In a first switching state, the at least one switch member electrically connects the sense current measurement circuit to the periodic signal voltage source for providing a first reference voltage, and in a second switching state, the at least one switch member electrically connects the sense current measurement circuit to a second reference voltage that is different from the first reference voltage.

A haptic operating element for a household appliance includes a display field which is at least partially configured as a touch-sensitive screen. The household appliance includes at least one haptic operating element and an additional screen fixed relative to the device. The household appliance has, in particular, a control device for operating the display field of the operating element and the screen fixed relative to the device. The haptic operating element can be particularly advantageously used in cooking devices.

An input device includes a digital pad and a digital pen. When a color picking switch of the digital pen is pressed by the user, the color picking switch generates a color picking signal. The color picking signal is transmitted to the digital pad or a computer through a wireless transmission module of the digital pen. According to the color picking signal, a color pointed through the digital pen is picked.

An input device includes a digital pad and a digital pen. When a color picking switch of the digital pen is pressed by the user, the color picking switch generates a color picking signal. The color picking signal is transmitted to the digital pad or a computer through a wireless transmission module of the digital pen. According to the color picking signal, a color pointed through the digital pen is picked.

Systems and methods for wireless capacitive presence detection are disclosed. In embodiments, a method includes: generating, by a tank circuit of a wireless presence detector, an electric field applied to a balanced electrode of the wireless presence detector utilizing power from a battery of the wireless presence detector; measuring, by a capacitive sensor of the wireless presence detector, a change in capacitance of the balance electrode; determining, by a microcontroller of the wireless presence detector, that the change in capacitance indicates a presence of a person within a predetermined distance of the balance electrode; and sending, by a radio circuit of the wireless presence detector, an alert to a remote gateway using a radio frequency sub-gigahertz (Ghz) transmission, wherein the alert is based on the determining that the change in capacitance indicates the presence of a person within the predetermined distance of the balance electrode.

A portable computer includes a display portion comprising a display and a base portion pivotally coupled to the display portion. The base portion may include a bottom case and a top case, formed from a dielectric material, coupled to the bottom case. The top case may include a top member defining a top surface of the base portion and a sidewall integrally formed with the top member and defining a side surface of the base portion. The portable computer may also include a sensing system including a first sensing system configured to determine a location of a touch input applied to the top surface of the base portion and a second sensing system configured to determine a force of the touch input.

The present disclosure provides an intelligent lighting control system. The lighting control system transmits a first wireless signal from a first light control module to a second light control module at a launch time. The first wireless signal is detected at the second light control module. A second wireless signal is transmitted from the second light control module to the first light control module in response to detecting receipt of the first wireless signal. The lighting control system detects receipt of the second wireless signal at the first light control module. A receipt time of the detection of the second wireless signal is recorded. The lighting control system determines a time of flight measured from the launch time to the receipt time.

A retrofit switch apparatus is attached to a traditional switch device. The traditional switch device has a traditional switch for accepting a first user manual operation to control a target. The retrofit switch apparatus includes an attaching device, a retrofit housing and a touch module. The attaching device is attached to the traditional switch device. The retrofit housing provides a containing space for covering the traditional switch. The touch module has a touch surface and a driver circuit. The touch surface receives a second user manual operation processed by the driver circuit.

A power supply control device, applied for an electronic device is disclosed. The electronic device includes a case, wherein a user holds the case to operate the electronic device. The power supply control device includes a sensing module, including a first sensing component for sensing whether the user is touching a first sensing area of the case to generate a first determination signal; and a second sensing component for sensing whether the user is touching a second sensing area of the case to generate a second determination signal; and a power supply module, including a first relay, for connecting or disconnecting a system power end of the electronic device from a power supply terminal according to the first determination signal; and a second relay, for connecting or disconnecting a system ground end of the electronic device from a ground terminal according to the second determination signal.

A doorbell switch includes a user input device configured to receive a user command to activate a doorbell sound output device, and activation circuitry configured to generate an activation signal in response to the user input device receiving the user command to activate the doorbell sound output device. A doorbell sound output device controller includes a switching device configured to control flow of electrical current between the doorbell sound output device controller and the doorbell sound output device, and control circuitry configured to control the switching device to enable flow of electrical current between the doorbell sound output device controller and the doorbell sound output device in response to receiving the activation signal from the doorbell switch.