科技日新月異，電子儀器創新不斷，延長線成為 了常見的電器產品，但常因為疏失而造成電器危害， 輕則跳電，重則造成失火。從此發想，我們希望製作 一個能夠遠端監測並開關的電源開關，本裝置設計有 藍芽模組、Arduino Nano及ACS712電流感測模組。 經ACS712所偵測之數值計算後，經由藍芽模組傳送 至手機的APP上，並結合Arduino Nano及繼電器， 來實現可遠端操控的智慧插座開關，未來也可再與其 他插座盒做連結，讓使用者可應用於產品資訊都可送 經雲端整合及監測。

Electronic devices have been created continuously over the development of technology. Extension wire has become one of the most common devices being used in this era. However, fire accidents continued happen when using this device which can damage the circuitry of electronic components, short circuit or even fire. Therefore, we wish to create a safety system which could provide alert to user when there is short circuit on the extension wire. The extension wire contains of Bluetooth Module, Arduino Nano and ACS712 module. ACS712 will initially measure the current over the wire and send the measured value to a mobile application via Bluetooth module. Using Arduino Nano as the main controller for data processing and relay as power control device, the circuitry in the extension wire can be controlled far away from the wire. In future, this can also be implemented in all other electronic devices to allow user to monitor their devices and improve their performance.