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/diy/ - Do It Yourself

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>> No.1103250 [View]
File: 7 KB, 115x106, Screen Shot 2016-12-23 at 11.01.23 AM.png [View same] [iqdb] [saucenao] [google]
1103250

What is this thing on a circuit diagram?

Why are there tildes, minuses, and plusses?

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