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/diy/ - Do It Yourself

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>> No.1438267 [View]
File: 39 KB, 984x584, the hard way.png [View same] [iqdb] [saucenao] [google]
1438267

I'm seeing about making a simple potentiometer-controlled variable USB load with a MOSFET, but I don't have any rail-to-rail comparators lying about. Anyone know a good way of getting an extra negative power rail like this?

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