USB device power down prevents losing suggestion and extends circuit

• Main Authors: WANG XIAOHONG, SU WEILIN, TIAN LIANFANG, HUANG SHIQIUJIANG, CHEN YINGJIE, LIU SHOUSONG
• Format: Patent
• Language: Chinese; English
• Published: 05.04.2017
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The utility model discloses a USB device power down prevents losing suggestion and extends circuit, the circuit includes USB interface circuit, charging and discharging module and alarm module, charging and discharging module is connected with USB interface circuit and alarm module respectively, the USB interface circuit respectively with the USB interface of computer and the USB interface connection of USB equipment, when the computer is switched on, the USB power of computer switch -on, the USB interface circuit is carried the USB power of computer and is charged for charging and discharging module, when the computer cut off the power supply, the USB power supply disconnection of computer, charging and discharging module discharges, makes alarm module switch on to prevent losing the suggestion. The utility model discloses simple structure, low cost, convenient to use, the break -make of having utilized the USB power of computer as switching signals control alarm module's work whether owing to need not addit