我要给DVR设备加延时电路,延时关机3-5分钟左右,DVR工作 12v 1A,该如何设计电路?
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你的意思是指输入电源断电后,维持3-5分钟,12W?如果是这样,意味一个很大的能量,需要加超级电容或者备份电池。