| 摘要 |
<p>PURPOSE: A device for receiving power from a smart light switch is provided to simply combine passive devices which do not require additional power, thereby effectively obtaining power necessary for turning a light on. CONSTITUTION: A triac device(110) turns power on/off which is provided to a light(20). The light is placed between a first terminal(30) and a second terminal(40). The first terminal is connected to a power line. The second terminal is connected to a wiring line. A diac device(120) controls the triac device to be turned off when the voltage applied to the diac device is lower than a reference voltage. The diac device controls the triac device to be turned on when the voltage applied to the diac device is larger than a reference voltage.</p> |
