But they’re close enough to figure-out the standard sizes for the parts. Now with parallax error, lens distortion, and trying to hit exact marks with only 1080 pixel resolution – these measurements are just ballpark estimates. It’s not perfect, but good for making some educated guesses.īecause the ‘master’ dimension used to calibrate the photo for measuring was along the horizontal, there is no percentage correction for that axis. I measured the vertical edges and got ~1.7″ for the height, which is a 4.6% difference. I put that original ‘hero shot’ of the time circuits into a CAD program and resized it until the long edge for the middle casing was 8.5 inches long. The metal enclosures used for each time circuit display are from LMB Heeger, Crown Royal Series part number CR852. The regular standalone LEDs used for the “AM/PM” indicator and the seconds marker are ubiquitous, so I don’t anticipate any trouble sourcing them. This won’t work for this project, because I need the displays to be able to change. Unlit segments are also not present/visible. Note the uneven spacing, the slight tilt on the ‘C’, and the segment intersecting the top of the ‘T’.
