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(2),7812和7912是常用件,但是关于引脚定义挺乱的,总之是
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图片尺寸827x1169![引脚图我们在讲解的时候,也是给大家一个通用模板,就像这个电路我们](https://i.ecywang.com/upload/1/img2.baidu.com/it/u=3300724922,2491821793&fm=253&fmt=auto&app=138&f=JPEG?w=800&h=249)
引脚图我们在讲解的时候,也是给大家一个通用模板,就像这个电路我们
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12v直流电瓶转9v使用
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图片尺寸611x791![7912可以这样用吗?](https://i.ecywang.com/upload/1/img2.baidu.com/it/u=1803177260,1456511491&fm=253&fmt=auto&app=138&f=JPEG?w=500&h=262)
7912可以这样用吗?
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