Lathe RPM Meter Powered With Treadmill Parts

On this DIY video I go over the install of a generic magnetic pickup RPM meter on my 3-in-1 mill lathe combo, but I use a treadmill power board to provide the DC power

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This is the RPM meter I am using https://amzn.to/3PSwV77

This is the enclosure box https://amzn.to/3FrgKdg