说明：  本文将总结我们公司所设计的各种电源电路，从中提炼出我们公司的电源平台，供大家参考。 我们通常用到的工作电压为12V和5V。12V主要用来驱动继电器工作或蜂鸣器，在本平台中将用＋12表示；5V将用＋5表示。在应用中，也用到24V和3V电源，分别用＋24和＋3表示。3V一般用在有电池做备用电源的场合。
(This paper will summarize our company designed the power supply circuit, from which we extract the Power platform, for your reference. We usually use the working voltage of 12 V and 5 V. 12V Relay mainly used to drive to work or buzzer sounded, in this platform will be used+12 said. 5V will be used+5 said. In this application, also applied to 24 V and 3 V power supply, and were used+24+3 said. 3V is generally done in a standby power batteries occasions.)