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ULN2003A继电器控制的接线原理图

Other Parts Discussed in Thread: ULN2003A

ULN2003A接继电器,有的设计中是不用加续流二极管的,芯片本身输出电流500MA,驱动能力应该够了,有的人说要加续流二极管想问一下,必要加吗

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