[Harvey] wrote in to share the Spindicator with us. The spindicator is a hard drive activity activity indicator built in a ring to resemble a dekatron. Using the pulses from the hard drive activity LED, [Harvey] tested several different methods of interpreting that data for display. The final version, negative edge triggered with a lowpass filter can be seen after the break.* It is nice and smooth and vaguely reminiscent of many programs’ loading screens.
He has pictures and tons of detail on the project including videos of previous versions that acted quite erratically.
