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Adjustable Countdown Timer

Project tutorial by dmytrosavchuk

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One Kitchen Timer To Cook It All

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Automated Lego Shooter

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  • Adjustable Countdown Timer 9 months ago

    Sorry for the delay. To set up it in minutes, you would need to play a little with the second argument in Countdown function in line 289. It is currently set to 962, so that the total time of the loop will be about 1 second. So to set it in minutes, I would start from replacing 962 by 962*60 and then adjust that value a bit so that the time intervals corresponds exactly to minutes.

  • Next level ultrasonic sensor 10 months ago

    Very nice project - thanks! Did you try to use the minimum or the median of several consequential readings instead of the mean to fix 25ms peaks issue? From your graph it appears that most of the readings correspond to the first peak, so the median will probably be more reliable. Or one can use some statistical tools to detect the smallest mode in the data.

  • Adjustable Countdown Timer 11 months ago

    Thanks for good words! Did you try to use analog pins instead? If it will not work for the buttons, you can probably use them for segments to free up some digital pins. One of them is analog anyway, so it should work, I guess. For example, you can assign "int segF = A1;" and use digital pin 7 for the reset button. If this does not work, you can simply use pin 6 that currently corresponds to the first digit of the display. Then the countdown will be limited to 999, but still gives you something. Then you would need to change the first line of SwitchDigit function to "for (int i=1; i<4; i++) {"

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