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In this video, I've explained how to make RPM meter or RPM tester or tachometer with Arduino. I've tested up to 5000 rpm and it has +/- 10% error. I think for us (talking about electronic hobbyist), this RPM meter has enough accuracy to use.
Here, I've used Arduino UNO board, one 16x2 LCD display, one potentiometer (value is 10K), one self-made IR sensor module.
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Download link for the program:
drive.google.com/drive/folder...
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IR sensor module, video link:
• Make an IR sensor modu...
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Other video:
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