Feature sets of smart home devices may be activated based on whether they can be supported by a selected power sourcing method. For example, thermostats may use a technique known as “power stealing” in order to steal power from the HVAC system. Differe...

An object of the present disclosure is to provide a power supply circuit and an air-conditioning device capable of reducing the number of super capacitors used. A power supply circuit (1) applied to an air-conditioning device includes a power supply unit (...

A communication adapter that can notify occurrence of power supply interruption to external management device in response to power supply interruption is provided. The communication adapter includes a power storage configured to receive power supply from a...