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/diy/ - Do It Yourself

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>> No.799870 [View]
File: 17 KB, 360x237, Toy-DC-Motor-Control.jpg [View same] [iqdb] [saucenao] [google]
799870

I need something that can act as a small axle and measure how fast it is being rotated.

I know a motor like pic related can do it, but is there a device specifically designed for this purpose?

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