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/diy/ - Do It Yourself

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>> No.2000868 [View]
File: 1.18 MB, 500x500, tumblr_nox8msRgXq1tjki5do1_500.gif [View same] [iqdb] [saucenao] [google]
2000868

>>2000849

for tachometers, you need to vary the frequency to match the rotational speed. so a 1500 RPM motor would need 25Hz flashes.
in old turntables, they had a 60Hz light flash onto the platter, but in order for it to work, it needed 100's of equally spaced painted dots painted around it, coz speed is so slow.

>> No.2000859 [DELETED]  [View]
File: 1.18 MB, 500x500, tumblr_nox8msRgXq1tjki5do1_500.gif [View same] [iqdb] [saucenao] [google]
2000859

>>2000849

for tachometers, you need to vary the frequency to match the rotational speed. so a 1500 RPM motor would need 1500Hz flashes.
in old turntables, they had a 60Hz light flash onto the platter, but in order for it to work, it needed 100's of equally spaced painted dots painted around it, coz speed is so slow.

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