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  • RobertL180 commented on BrittLiv's instructable Puzzle Alarm Clock8 months ago
    Puzzle Alarm Clock

    I am impressed with your skills with hardware. And I love how you decided you wanted something and just went ahead and made it. That said, I noticed some minor imperfections in your software.1) There is more than one way to represent certain digits on a 7-segment display. You might want to include multiple possibilities for the digits 1 (left or right side of cell), 6 (top horizontal segment present or absent), 7 (top left vertical present or absent), and 9 (bottom horizontal present or absent). Also, for the leftmost digit only, you might want to treat a blank as a zero.2) Near Daylight Saving Time changes, a bug will manifest itself. The day of a Daylight Saving Time change is either 23 or 25 hours (real time) long. Your code assumes that a day is always 24 hours. Unless you repair th...see more »I am impressed with your skills with hardware. And I love how you decided you wanted something and just went ahead and made it. That said, I noticed some minor imperfections in your software.1) There is more than one way to represent certain digits on a 7-segment display. You might want to include multiple possibilities for the digits 1 (left or right side of cell), 6 (top horizontal segment present or absent), 7 (top left vertical present or absent), and 9 (bottom horizontal present or absent). Also, for the leftmost digit only, you might want to treat a blank as a zero.2) Near Daylight Saving Time changes, a bug will manifest itself. The day of a Daylight Saving Time change is either 23 or 25 hours (real time) long. Your code assumes that a day is always 24 hours. Unless you repair this, the alarm will sound at the wrong time.

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